As has been said many times before, (several times in this thread) the Bombard 380 Aerotec with a 25hp 2 stroke is rated best in its class, performance wise, by most here on Ribnet. But almost any RIB will out perform it.
The Zodiacs, Honwaves, Suzumars etc all perform perfectly well in the conditions most SIB owners will go out in. Only a few, and I'm not one, will go out in more challenging conditions.
SIBs are the cheap city cars of the boating world, you ain't going to get Ferrari performance;
for the price of a Fiat Panda.
So look at several in your price range and then decide what you like.
Remember, like cars, you can always trade it for a better one.