Like many I have found on the forum its been awhile from my last build and, I have a new build in mind and looking for advice. There is no financial limit to say of... but I idealy dont want to go above 4k. So please tell me what you think so far. And Ill be running Vista 64-Bit Ultimate
^Agreed. AMD is not in the high end any more. If you are building a good Gaming PC go with a E6550/E6750 or a Q6600. For motherboard (assuming Intel) I recommend you get a P35x-DS3x(ie. P35-DS3L, P35-DS3R, etc). CrossFire/SLI is useless (unless playing Crysis,etc on 30"+ monitor with everything on high) imo. You should just get a 8800GT or 8800GTX.
The build looks great for gaming as it is. That motherboard will give you a great upgrade potential for the future, as AMD's Phenom quads should be sorted within the next couple of months giving you a nice upgrade path if you so choose.