I kind of agree with Diki here. If this is only for the studio and not for live use, there are other things that can give you more bang for the buck for $500. I would get software or Melodyne Celemony for vocal harmonies, something like that.

You wouldn't be asking this question is money were out of the question. If you have plenty, get the s910 or better yet a T3.

Beakybird