NICE BOARD CHOICE , I have the same board, love it, great for overclocking. I know for a fact that the slk-948 will fit on the board b/c I own it, and I'm pretty sure that the SP-94 will fit. The one thing that you might have to do is to trim a little off the edge of the northbridge HS b/c it hits the HSF a little when you're installing it. I had to take a hacksaw to mine and take off the fin on the very end of the HS to get it to fit w/o hitting the thermalright. By the way, those temps aren't bad at all, look at my sig for my temps with the slk and AS5, granted its summer, but still your temps aren't bad at all.
Good Luck.