Hixx, I also cut our part of the foam to make the ailerons move more easily and further. Seems to be working great.
I will second what Javier said about the warbirds. I've had two Mustangs and they are a bear to fly as they need speed to stay up. Slow down a little and they drop a wing and that means a crash if you are close to the ground (landing).
If you have to have a warbird I might suggest a Corsair as they tend to have more wing area per weight than others. I have a GWS Corsair and really enjoy it. Even still you need to get as much motor in it as possible. The 350motor that came with it was a joke. I put a 400 in it and it would at least fly. I then put a 480 in it and it flew well. I've sense put in a small outrunner and 18A esc and it flies beautifully. Combo price for motor and esc was like $40 or less. Will find it for you if this is the route you think you want.
3D planes are alot of fun and are fairly easy to fly due to the large wing area and very light weight. The easiest flying plane I own is a big 3D plane called the Lucy 3D from Polkshobbies.
http://216.86.38.243/POLKS/itemdesc.asp?CartId={EA3AC125-7704-EVEREST4BE6-9A13-06A07E8593C8}&ic=PLK10055&eq=&Tp=
or try www.polkshobbies.com
5lb plane with batteries and everything ready to fly. 57" wing span. They have several balsa planes for $50 that are easy conversions to electric and come almost totally completed as an ARF. I put a $64 outrunner from balsa products in it and it will straight vertical out of site yet will glide very slowly for an easy touch landing. Low weight compared to big wing area. Something to consider for next plane.

Carl