Your Ram should be ok even when you upgrade GPU and/or CPU#
Also you sed something about the triple channel RAM but if you read this article in 5th paragraph it says that the new Zambezi CPUs will only support dual-channel memory controller. http://www.xbitlabs.com/news/cpu/display/20100826225852_Desktop_Bulldozer_Processors_Will_Require_New_Platforms_AMD.html#
If you thinking of buying the new Bulldozer then stay with this MOBO as it can run the HD 6970 with no problem for now.
Then when the new Bulldozers come out get a new MOBO compatible with the new series of Bulldozers.
The PSU might be able to run you one HD 6970, but if you thinking of going into crossfire in future get somthink like 850W or 900W as the new line of ATI card have low power combustions and run cooler then the HD 5xxx series.
Also look into corsair PSUs as they're high quality PSUs, better then the OCZ PSUs.