Rockrider 520 or 540 or Boardman?

i am looking to buy my daughter an mtb for very light use, mainly on bridle paths and a little bit of gravel riding. The three bikes I am currently considering are the Boardman sport (currently on special and available with British Cycling discount), Rockrider 520 and the 540, which is also currently at a reduced price. With the rockriders, is the spec on the 540 worth the extra cast at the reduced price or is the 520 better value? Any help appreciated.
http://www.decathlon.co.uk/rockrider-520-mountain-bike-id_8293188.html#anchor_ComponentProductTechnicalInformation
http://www.decathlon.co.uk/rockrider-540-mountain-bike-id_8293149.html#anchor_ComponentProductTechnicalInformation
http://www.halfords.com/cycling/bikes/mountain-bikes/boardman-mountain-bike-sport-ht-650b-limited-edition
http://www.decathlon.co.uk/rockrider-520-mountain-bike-id_8293188.html#anchor_ComponentProductTechnicalInformation
http://www.decathlon.co.uk/rockrider-540-mountain-bike-id_8293149.html#anchor_ComponentProductTechnicalInformation
http://www.halfords.com/cycling/bikes/mountain-bikes/boardman-mountain-bike-sport-ht-650b-limited-edition
0
Posts
The Boardman is ok, but cheap drivetrain and hefty overall weight. The 560 blows it away.
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
I'd say it's worth the extra £20. I'd pay that just to not have white handlebars.
But the 560 is one hell of a lot more bike for another £50, but I understand what you're saying.
Bird Aeris 120 | Boardman Team 650b | Boardman Pro FS | Calibre Two.two