Buying a groupset......

Righto, looking to build up a training/winter bike in the near future, i'm on a budget (around £800). Now i've managed to find a 5700 105 groupset for around £365 from Germany but if i could get a SRAM Rival group for a similar price i'd rather go that way, can't find anything, can anyone help me out?
Thanks in advance
Thanks in advance
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Canyon Ultimate CF SLX Aero 09
Cervelo P5 EPS
www.bikeradar.com/forums/viewtopic.php?f=40044&t=13038799
I've since found a place on eBay for £430 but thanks for your input anyway
Commuting / Winter rides - Jamis Renegade Expert
Pootling / Offroad - All-City Macho Man Disc
Fast rides Cannondale SuperSix Ultegra
http://www.roadbikeparts.co.uk/
--Jens Voight
rival currently out of stock though
Only had SRAM for a few months but I prefer Shimano.
http://www.shinybikes.com/campagnolo-ve ... -2011.html
Campag is nice but all my other gear is Shimano. 105 may be the way i go, Rival is going to cost £60-70 more and this is supposed to be on a budget!