I agree that the Wraith and Surge are probably the most similar in this type of disc. The Wraiths I've thrown are domier than my Surges, and have a wider rim. The wider rim makes the Wraith faster out of the gate, but makes it more difficult for me to get a good snap. So I stick with Surges.
If you haven't tried the Katana or Nuke, I'd say it's worth a shot. I don't carry either, since I hate the WIDE rim, and find that I can't control them. But some people swear by them.
Lastly, if I recommend any driver...or any disc, really...it's the PD. DiscMania. Get it in S plastic in a lighter weight than you're used to. They are m-o-n-e-y.