Some advice from a married guy.
Buy what you want now. All of it. Even the new QX6800 (or whatever the top of the line cpu is.) You may never have another chance.
I am in the same boat you are regarding the DDR ram. I actually have a 9800pro AGP video card also.
So, I am going to get the ASrock board now, but will probably get the e6600 chip instead of the e6300.
Then, 3-4 months from now, I'll get an ati x1950pro video card and maybe ddr2 ram, but the tests on this board don't show any improvement on ddr-ddr2, so I might wait on the ram until I'm ready to upgrade to an Asus P5B (or whatever the best overclocker is)
This way, I can get the C2D now, get my video card pretty soon, and when performance is an issue, upgrade to an overclockable mb. All I have wasted is $50 for the ASrock mb.
BTW, congrats on your engagement.
How soon are you getting married?
-Chris