Umm...yeah, i might. I have 2 PC's; a 256MB DDR RAM laptop and a 512MB DDR RAM desktop. I get what i think's best for my desktop, but my laptop's a different story. Right now, i'm using MSAS on it, as it's free and doesn't seem to slow down performance.
And Corolla, i don't get you. CounterSpy's a replacement for SP2? Well, if it is, i think it'd still be best to go with SP2, cause it doesn't take up loads of RAM.
SpySweeper's really improved since the first time i tried it - It scans a lot faster, yet doesn't affect performance much, which is a big plus for me.