Gentlemen - sorry for not responding sooner but I do not have internet at home. Or cable TV for that matter!! Come to think of it, I don't even have a home phone.
Totally irrelevant so I'll get to the point.
Most of my 4-stroke experience is with the smaller engines.
OS .20, Surpass .26 (2), SAITO .30 (4).
Regarding the Surpass .30 - I have never owned or flown one so I can only relate feedback from others.
I have not heard one positive comment about the Surpass .30. Every person I know who has one is disappointed with what some have called dismal power.
The Surpass .26 is GREAT - in fact, after watching my friend fly his Surpass .30, I'd wager that the .26 makes substantially more power.
There is also a non-Surpass .20 that is a fine little sport engine. But, it's been out of production for a while.
Regarding my favorite - it's still the SAITO .30. That little gem continues to amaze me.
Ask anyone who has seen my Argus fly and they'll confirm its ability.
Bob Z.
ps - is anyone curious about the next size up in 4S power? I have good information on a few .40s.