I basically have the same system, HP Pavilion p6xxx series. The distro that worked best with me is the iAtkos S3 ver 2. U'll probably encounter problems with the soundcard AlC662. I'd suggest u buy a generic USB dongle or if u plan to work with recording music, use a USB audio interface. The iAtkos S3 V2 installs the SL 10.6.3, and you can update to 10.6.8 via the usual Software Update without problems.