Radon, Cannondale or Boardman

Hi Folks

I'm looking for a new bike for my wife, and had narrowed it down to a GT or a Scott. However, we went out at the weekend so she could try a few and she's decided a female frame suits her better...so now three options:

Boardman Fi Comp (down to £499 at halfords, and with a possible 10% reduction on that) - although I think the spec in the link below is slightly innacurate - the brakes on the one we saw were Avid Juicy 3, and rear mech was SRAM X7)
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_777715_langId_-1_categoryId_165499#tab2

Radon ZR Lady 5.0 (about £540 incl. shipping I reckon):
http://www.bike-discount.de/shop/k1283/a81891/zr-lady-5-0.html

Cannondale SL2 feminine (for sale at my LBS for £599, not from Evans, but the info on their site doesn't have the full spec):
http://www.evanscycles.com/products/cannondale/trail-sl-2-female-2011-mountain-bike-ec025263#features

The spec's are too different for me to know what is better/ worse - all different forks for example - so any advice would be appreciated.

Thanks for your help!!