I recently bought a balsa nova 1.2 arf. I am having trouble deciding on what enging to run. I have 4 choices and am looking for suggestions. I currently have a super tiger 2500, OS 1.6, OS 1.08 and a saito 1.2 four stroke. What would be best all around engine. I do not fly much 3d but dont want to under power it either. I also dont want to put too much weight in the back.

Thanks
Mike