I'm sure there are better, more recent translations, but I've read Plato: Complete Works (John Cooper) and a reasonable bit of Jowett's translations, and in my (layman's) opinion, if newer translations aren't available, Jowett's will do just fine.
>>ttonky+(OP)
I'm not saying they're awful, just that you're better off getting a reputable 20th century translation. Even a lot of the translations in the Complete Works you mention are getting on in years but it is the best complete edition...