P4T533Raid have some questions

im buying one of these boards, im going to keep my current processor for the time being, but im buying a new one soon, will a 400mhz bus 1.7 wilamette work on this until i get a new chip?
the new chip is gonna be a 2.5mhz, should i go with a 400 or 533 bus and how do i know if a chip is a C1 stepping off of newegg.com? Also where can i get a P4T533 with raid, newegg doesnt have them.

Should work, I know that a P4B533-E it will. 533 bus and the new chips 2.5 2.66 2.8 3.0 all are the C1 stepping. Maybe more, just ask when purchasing.

how do i ask newegg? also it seems newegg doesnt have the P4T533 with raid so where could i get it?

Run Time has it for around $287 shipped.