I plan on sqeezing a bit more out of my current setup (mainly my video card) and then sitting on it until Hammers have a chance to get into the market and become stable and extra fast.
Other than that, my I/O system is a bit lacking in drive space so I am in the middle of getting 3x Cheetah 15K 36Gb and running RAID 5. That should hold me over for a while.