Hi looking for some advice on my first bike for commuting to work.

The route will be 80-90% trails/tracks off road and the distance travelled will be ten miles there and ten miles back. I’m looking for something quite fast on this surface and also reliable (within my price range)

I have picked out the following bikes so far, 2 hybrids and 2 cyclecross which are within my range, which of these would you recommend?

Giant Escape 2 (2012) http://www.allterraincycles.co.uk/product/125794.html

Norco CCX3 (2012) http://www.evanscycles.com/products/...-bike-ec031686

Specialized Sirrus (2011) http://www.leisurewheels.co.uk/produ...d=m9b0s18p8846

Revolution Cross (2012) http://www.edinburghbicycle.com/prod...ution-cross-12

Both Hybrids would be priced about the same whereas the cx bikes are around £100 more expensive. Would appreciate if you could consider costs as well in terms of the most 'bang for buck'

Cheers