Sig 4 Star 60 ARF
I have the BTE Venture 60 (same basic plane, same designer) and the 91 or 100 will be a smart choice.
Reason?
The 4 Star won't be your last plane....Eventually you'll want a Chipmunk, or the H9 Mustang...or the Ultra Stick...all of these will be a perfect match with a 91 or 100.
I also have the 72 and although it will fly it, probrably very well, the engine choice will confine you to 40 size aircraft mostly.
So thinking ahead at least a plane or two (old chess habit) I would best reccomend the 91 or 100.
Good luck and keep us posted.