I just use Ad-aware SE Personal...no real need for Pro. Works great for free...and I just downloaded Spysweeper--it didn't find anything after I scanned with Ad-Aware, and in fact, when I restored the files that Ad-Aware found, Spysweeper found 6 less (of 67)--cookies excluded, I dumped them first ;p
So, yeah...I'll stick with Ad-aware SE Personal And Major, why does AA "suck"? I see nothing better about Spysweeper (granted, only used it for ~5 minutes)...
-X