My favorite translation is by Richard Pevear and Larissa Volokhonsky - I prefer it to Katz anyway. I haven't examined the Ready edition. (I ended up aquiring all of Dostoevsky in Pevear/Volokhonsky translations, I like them so much -- I understand other dislike their editions for a number of reasons, tho)

I also really liked David McDuff's translation years ago.

Any of these are going to be miles better then Garnett, though.