Sorry, seeking advice about £300-ish bike

CheeseCloth

Sorry, same old same old, bike buying advice question.

I have read the sticky post about which bike to buy for the £300 to £500 price range but wondered if I could ask for some more advice here.

I've read myself into a state of confusion since there are so many choices available.

Here are some bikes I'm considering:

Kona Splice 29er
http://www.wiggle.co.uk/kona-splice-29er/

B'TWIN Rockrider 500
http://www.decathlon.co.uk/rockrider-50 ... 93150.html

B'TWIN Rockrider 520
http://www.decathlon.co.uk/rockrider-52 ... 93188.html

Cube Aim 26 Hardtail Bike 2014
http://www.chainreactioncycles.com/cube ... prod114091

Calibre Two.Two
http://www.gooutdoors.co.uk/calibre-two ... ke-p275612

I wondered if anyone had any advice about which of these is the "best" bike? I realise that a lot will be down to persona preference, but I find it hard to know if one is better than the other, or if they're all much of a muchness etc?

Any advice would be much appreciated.

Thanks

The Rookie

The Kona is well specced, thhe discount makes it a good buy, the Cube has a shockingly bad fork that has no place in a mountain bike.
The calibre is solidly specced, not sure what Fork is on the RR but it looks like it's probably a Manitou and more than good enough.

My choice of those would be the Kona.