I'm with Hemi on this one. I'd go with what people consider a low wing trainer before the 330, like the Sig 4 Star or Goldberg Tiger. 4 Star and Tiger come in Kit and ARF forms. Even though they are considered low wing trainers they are capable of many many things a high wing trainer isn't while maintaining extremely easy to control flying characteristics. The Sig 4 Star is a very easy build, so if you ever wanted to try to build your own, that is an excellent one to start with. Kit Built 4 Stars also come out lighter than the ARF version.

Edit:

If you get a .60 size plane like the 4 Star 60 or Tiger 60 the .91 thumper in your Extra would be great, so you won't have to buy a new engine/servo's unless you just really wanted to. The added benefit is you can get the engine completely broken in by the time your ready for the 330. People always tell you not to put a brand new engine in a plane you care about. Reliabilty go's up dramatically after you get a few gallons on it.