OK, I picked up a Great Planes PT-60 trainer, and I am trying to decide on what engine to put in the plane that will be good for future kits that I build. I think I have it narrowed down to the O.S. .61 FX, the Thunder Tiger GP .61 ABC, or the Tower Hobbies .61. Assuming price is not a concern, which engine would be better for future use?

Thanks,

John