I purchased the OCZ memory for my P6T and ran into a couple of problems at first, but realized that the correct BIOS settings fixed everything. From the forums I read, everyone had a great experience with Corsair. Right now I have my OCZ which is rated at 1600MHz running at 1800MHz with no stability issues. Setting my QPI/DRAM volt to 1.35625 fixed the problem where it only read 4GB instead of 6GB. As for G.Skill, I dont know enough to comment on them.