Hello from newby and advice on shortlist please

Hi all. I have decided to make a latish (46 years old) entry into cycling and am buying a mountain bike on the ride to work scheme from Evans. I set myself a limit of £400 and liked the look of the Pinnacle Peak 3. I now have my voucher for £450 to allow for a few accessories but have been doing some more homework and wonder now whether I should spend the whole lot on one of two other bikes that appear to be well thought of in reviews. They are the Cannondale F5 Disc 2008 and the GT Avalanche 1.0 Disc 2008. Links to all 3 here:
http://www.evanscycles.com/products/pin ... e-ec000921
http://www.evanscycles.com/products/can ... e-ec000096
http://www.evanscycles.com/products/gt/ ... e-ec000669
I'm sure the Pinnacle would be fine for my uses, some road use but I also want to make use of the decent locations in the area like the Mendips and Quantocks for the odd sensible off road run but there is a lack of opinions around about how good these Pinnacle bikes are. I'm told Evans give a lifetime guarantee on the frame and the rest of the spec is very similar to the other two, maybe slightly better in fact. Could I ask for some opinions from you knowledgable peeps please
They are making up all 3 for me to try and choose on the weekend so options still open for now.
Thanks in advance....handful
http://www.evanscycles.com/products/pin ... e-ec000921
http://www.evanscycles.com/products/can ... e-ec000096
http://www.evanscycles.com/products/gt/ ... e-ec000669
I'm sure the Pinnacle would be fine for my uses, some road use but I also want to make use of the decent locations in the area like the Mendips and Quantocks for the odd sensible off road run but there is a lack of opinions around about how good these Pinnacle bikes are. I'm told Evans give a lifetime guarantee on the frame and the rest of the spec is very similar to the other two, maybe slightly better in fact. Could I ask for some opinions from you knowledgable peeps please

Thanks in advance....handful
Vaaru Titanium Sram Red eTap
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
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You have picked out 3 very good value and highly regarded machines there! the GT probably edges it on spec and reputation (the WMB mag rated it as the best 500 pound bike they had ever tested): I'd visit the store and see what feels best. You need to get the right size anyway, and they vary between brands.
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
Does this make much difference to the feel of the brakes and to the amount of maintenance required? Does this point give the other two bikes an advantage? Thanks for any opinions on this.
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
Hydro are generally better, less maintenance overall, but when do go wrong, usually are harder to fix.
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
Auriga Comps are hydro ;-)
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
Bit of a clanger though, I wonder how many people have opted for something else because they think it has mechanicals.
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
I'm a bit surprised nobody has recommended the cannondale though, it looks great in black and looks like comparable spec.
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise
I have to confess being sorely tempted by the cannondale, a very nice bike that felt very well put together and had the added unadvertised attraction of Avid Juicy 3 hydros. But with the advice from you guys ringing in my ears I plumped for the GT. I got the distinct impression that the sales guy was desperately trying to push me towards the Pinnacle though! More or less told me I was a brand tart
Thanks again for the very sound advice.
Moda Chord with drop bars and Rival shifters - winter/do it all bike
Orbea Rise