that would be the "sig ultimate fun fly".
you can go to http://www.sigmfg.com and look it up (having trouble direct linking it due to screwy web page design.)

I have flown the ultimate bipe that Marc (rcadmin) is reviewing for next months RCU magazine and it is NOT a beginners plane. (not sure of the make, i think its a great planes...)

I also have heard a few good things about the skybolt from great planes but I have no personal expirience with it.

what you can do now to get yourself ready for a "hotter" plane is to turn your avistar into an acrobat.

increase the control throws a bit at a time. get familiar with it each time until you are comfortable.
also bring the CG back on the plane a 1/4" or so at a time so make it more aerobatic.

most people dont realize that their old trainer can be a great "second" plane with a little work.

I did the above mods to a few trainers and I could do rolls, loops, snaprolls, inverted flight, flat spins (really nice flat spins), hammerheads, tailslides, and tumbles. also its the plane you are comfortable with so you can really push yourself without too much worry (just make sure you got a bit of altitude)

play around with the above mods... and you will be suprised what a docile little trainer can do.