We have the 310 RIB from west marine, not the double floor one, single floor, wanted less weight. Rides exceptionally well, good in chop etc. Does take a decent about of HP to move though, we initially tried our 8hp 2 stroke and pretty much would only plane with me, put the wife and dog in and no go. We then got a 20hp (weighs the same as the 15) Suzuki and ideal setup, quick to plane only need 1/4 to 1/2 throttle while on plane.
Highly recommend raft, great value great handling, but does take HP to get on plane.