get this g.skill instead if you plan to buyt soon.
Newegg.com - G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory - Desktop Memory
The PK series has always been better than the PQ and right now it's only 5 bucks more.
Also get a Xigmatek S1283. The P5Q Pro is a good choice
Will this type of ram work with my mobo?