lol m1ddy...Q6000!! just about everything worth while will be multithreaded soon. e6850=6.0ghz bandwidth, q6600=9.6ghz bandwidth.
If you get a go stepping you can overclock to 3.0ghz no problems at all.
I have a crappy b3 and it does 3.0 easily. So overclock the e6850 to 3.4=6.8ghz banwidth or the q6000@3.0= 12 ghz bandwidth, to me it's a no brainer.