If you want to stick with your current engine, the Tiger 2 would be a great choice.  If you want to go up a size and get a bigger engine, there is a larger Tiger 2 that would be great, or the 4 Star 60 ARF is also a good choice.  If you want to try your hand at building a kit, then the 4 Star 40 is a great choice and would use your existing engine.