I'm really indifferent to video cards, ati or nvidia, they are both great chipsets. I have owned cards from both, and never had a problem with either. I'm moving off of a 9800xt, so trying nvidia for the next one. There also seems to be more support in the market for SLI, rather then crossfire. After the above respsonses I will be going with a 7900GTX to start off with, and add a second down the road for SLI.
As for the processors... the 170 is identical to the 4400 with the exception of stock speed. They both come off the same lines, and go through the same testing... but I have seen that the 170 has more over-clocking ability and is more stable. My orginal thought was to take a 4400... but after reading up on quite a few sites, the 170 seems to be the way to go.
Heatsink: I'll have to take a look at that. I was pretty torn on heatsink/fans... zalman has always been good for me though... But I will have to look at this xp90c thing you speak of.
Great Feedback all... Thanks much.