ok, dont buy another 8600gt for sli. you wont get a fraction of a speed boost in almost all games. that 9800gt is really nice though... you should auto notify and wait...
the freezer 7 pro is a really nice CPU heatsink but you could also consider the Zalman 9500
those are very nice.
also, could you provide more info about your comp please. such as mbo, CPU, socket, RAM, ect..