if you really want to properly fill your budget that you have allotted, then go for a z68/ 2500k build easily the best bang for your buck imho, I have the storm scout and well its awesome (Of course I replaced most of the fans except for the top one with enermax magma 120mm fans and they move massive amounts of air and are basically silent.
Then again on the cheap the 955 is only 110 at frys and you could get that and a cheap am3 mobo and probably be well under your budget and will more then meet your processing power needs imo.
The Sandy Bridge chips are amazing but the value or a 955 is almost unbeatable at the ~100 dollar cpu mark (look at my sig below mines easily at 3.9ghz 24/7) and an am3 mobo will cost you significantly less to get the features you want vs a p67 or z68 setup, either would be great choices but that is my 2 cents
yeah you have a nice build aznshinobi but for the money I'd go with a 955 for a little of a cheaper build. If I was going sandy bridge I'd at least spulrge for the i52500k which imo is the best bang for your buck