Bought a new CPU, looking for advice on ram, mobo, and PSU

Bear with me here; I do have some general knowledge of computer hardware but I'm afraid I don't know enough, hence this thread.

I recently bought an Intel Core 2 Quad Q9550 (link) that I plan to overclock (yes, I have an aftermarket cooler for it). I suspect I will need to upgrade the following parts of my computer to avoid any overclocking/general problems and would like to get some good advice.

Motherboard: Asus P5B (specifications)

Ram: 2 Gigs crucial ballistix DDR2 667 MHZ

PSU: Thermaltake Purepower 600W (specifications)

First, I understand that my current mobo is aging and only supports a max fsb of 1066, while the Q9550 runs at 1333mhz. Asus has released BIOS updates for this board that will raise the max fsb, but from what I've heard its only beta support. Should I flash this mobo for the new CPU, or buy a new motherboard that natively supports a higher FSB? If I need to purchase a new mobo, could someone give me any good suggestions? (Hopefully around $150-200)

Second, I'd like to get faster RAM to go with overclocking the CPU. I'm looking for a good solid brand of DDR2-1066 memory that would work well with my current mobo (or whatever one I end up buying, if thats the case).

Lastly, I am wondering about my PSU. It has no problem powering my 8800GT and E6600 (OC'd at 2.8 GHZ), though I want to know how it will handle this newer hardware.

Thanks...

Thanks for the reply. Would anyone else recommend that mobo?

Yes, UDxP series is a very good board for overclocking, both on the AMD and Intel side.