My vote goes for the ultimate. I have a GP 40 size ultimate with a saito 72 on it and it is great. This was my third plane after the trainer and a 4*60. It is very easy to fly and is solid in the air. You have to learn how to land with it bit it is not to difficult. Just keep some power on and it comes in very nice. They glide like a rock. This plane has a very good roll rate and I fly mine on low rates most of the time. It flew well with an OS 46 FX but is much better with the Saito 72. It has ulimited vertical. I love my ultimate and am looking at getting a bigger one. The world models ultimate is a nice plane someone in my club has one and it flies really good on a 46 size engine.

Rick