Hi, and good luck with whatever your choice.
But I think many people are having luck with Kingston HyperX PC3500 DDR. Sure people will say, get Corsair, but the ratings are the same, and you usually end up paying a $10-15 per stick premium for just the name alone. The performance is the same. Of course, I just paid for 512MB X 2 sticks of HyperX Kingston ram to go with my ABIT IC7 and P4c 2.4Ghz. And if your O'C a P4C version of the P4 line, DON'T get any PC3200 or lower RAM as you will have less probability of getting up there, and more chance of instability.
Another thing that I was told by the AnandTech motherboard editor is that a DDR comparison roundup review tested on 20 different 865 & 875 MB's was supposed to be up a week ago, but then they decided to test more DDR dims and MB's. So hopefully it will be up this week. But it won't do me any good now, I was really looking forward to it to help me out in selecting DDR Ram for my new system
If you have any other questions about your new setup, PM me.