That's good for Nvidia, the HD 6850 takes only 127 watts on full load each (a factory overclocked 460 about 200W) but more power never hurt anyone.
The factory OCed 460 are faster thanm the regular 6850s but you can OC your 6850s to the HD 6870 level or buy factory overclocked ones as well (XFX HD 6850 Black Edition, Sapphire HD 6850 Toxic).
LE Lemme see that.
LE Nah, from what I've see the bundles are even more expensive that separate parts. For good prices, Scan.co. ebuyer, overclockers.ukhttp://www.ebuyer.com/product/240501http://www.ebuyer.com/product/174326
some nice cheap RAM there