Depends how much you got to spend and if you're willing to give up space for speed. I personally like the Mushkin Chronos or the Samsung 470 series. Samsung is about to release their SATA3 stuff next month I think. Most ppl will do fine with 120GB, which runs from 175$-250$ depending on sata2/sata3. You can always just put nothing but osx/apps on the ssd and have all storage saved on external or relocate it to optical bay (which requires more work but nt that complicated). Installing ssd is the same no matter which you get.