First Bike: Trek, Specialized or KHS?

Hello all,
I posted this earlier in MTB Buying advice but it looks a better fit here, so I moved it.
After almost 22 years of not riding a bike, I rode for about half a day a couple of weeks ago (dirt and paved roads) and remembered just how much I liked it.
With that said, I'd really appreciate some purchasing advice. I want to get into XC riding, have a tight budget, and not much choice in the local market but the following alternatives:
2014 Specialized Hardrock Sport Disc 29er
http://www.specialized.com/us/en/bikes/ ... rt-disc-29
2014 Trek X-Caliber 6
http://www.trekbikes.com/us/en/bikes/mo ... caliber_6/
2013 or 2014 KHS Aguila
-2014: http://khsbicycles.com/bikes/2014-khs-models/aguila-14/
-2013: http://khsbicycles.com/bikes/2013-khs-models/aguila/
I've rode them all and frankly feel comfortable with all of them. The Hardrock seems a bit more relaxed/upright than the Trek or KHS, but it's not something that would make me choose between one or the other. I'm more interested in the best bang for buck with components, frame durability, design and it's ability to take upgrades (rather than replacing the whole bike).
Thank you all in advance for the time and help with the topic.
PD: I've also seen this available, a 2013 Kona Mahuna:
http://2k13.konaworld.com/bike.cfm?content=mahuna
I posted this earlier in MTB Buying advice but it looks a better fit here, so I moved it.
After almost 22 years of not riding a bike, I rode for about half a day a couple of weeks ago (dirt and paved roads) and remembered just how much I liked it.
With that said, I'd really appreciate some purchasing advice. I want to get into XC riding, have a tight budget, and not much choice in the local market but the following alternatives:
2014 Specialized Hardrock Sport Disc 29er
http://www.specialized.com/us/en/bikes/ ... rt-disc-29
2014 Trek X-Caliber 6
http://www.trekbikes.com/us/en/bikes/mo ... caliber_6/
2013 or 2014 KHS Aguila
-2014: http://khsbicycles.com/bikes/2014-khs-models/aguila-14/
-2013: http://khsbicycles.com/bikes/2013-khs-models/aguila/
I've rode them all and frankly feel comfortable with all of them. The Hardrock seems a bit more relaxed/upright than the Trek or KHS, but it's not something that would make me choose between one or the other. I'm more interested in the best bang for buck with components, frame durability, design and it's ability to take upgrades (rather than replacing the whole bike).
Thank you all in advance for the time and help with the topic.
PD: I've also seen this available, a 2013 Kona Mahuna:
http://2k13.konaworld.com/bike.cfm?content=mahuna
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Scandal
Felt Roadie
Scandal
Felt Roadie
I gather an X Caliber 7 might be around Rockhopper 29 parity, but the Trek isn't available and the Spec shoots up the price about 200-300 dollars.
What do you think of KHS? It's not a big name brand but seems to offer slightly better components on the entry-level range.
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
So the risk of a lemon by a lesser known brand (like KHS) won't be higher than with Spec or Trek? I found the Aguila interesting for the same price, but the Trek's name has some weight to it (XCal 6).
I've also found this, an Orbea that seems a bit better specced:
Orbea MX 29 20:
http://www.orbea.com/us-en/bicycles/mx-29-20/
What do you think, should I add it to the list?
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
Thanks for the reply. After checking all of them out again, and factoring in their prices, I've narrowed the choice to the following 2 bikes:
- Trek X Caliber 6
X Caliber "Alpha Gold Aluminum" (I assume it's 6061) w/ "semi-integrated" headtube frame, mechanically formed; SRAM X4 rear derailleur / Altus on front, 24 speed, Shimano Altus Crank & Cassette, SR Suntour XCM 30mm stanchions with preload adj. & lock, 100mm travel, Shimano M395 Hydro brakes w/ 160mm rotors (rotors have round "drill hole" like pattern).
Runs Bontrager XR1 tires on Bontrager AT-650 double-walled rims.
Lifetime warranty on frame, 1 year components.
- KHS Aguila
6061 Aluminum, allegedly hydro-formed; Shimano Acera rear derailleur / Acera on front, 29 speed, Alivio Crank & Cassette, SR Suntour XCR 32mm stanchions with preload adj., rebound adj. & lock, 100mm travel, Shimano M395 Hydro brakes w/ 160mm rotors (rotors have a straight, angled rounded rectangle pattern).
Runs CST Critter tires on Weinmann XM25 double-walled rims.
5 year warranty on frame, 1 year components.
Everything else is quite similar. And, for some reason, the Aguila seemed to weight a bit less than the Trek; but the Trek felt like it was put together/tuned better.
Which would you choose/recommend given that they share the price tag?
Thanks again for the time and help.
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/