With a 2' beak and 2' swim platform, the boat is approx the same size as your 25. However, side by side it will look the entire 4' longer. The deck looks much longer, the cockpit is much larger. Quite a bit more room behind the front bolsters. With twins it is much heavier so will probably ride much nicer. I think the 29 fountain is a great looking boat. Especially with a single. With twins, it sits a little too low in the rear for me. Not sure if they are prone to water coming through the vents like the 32.
I had trouble with the seat positioning on the 29. My knees were eating the dash when seated. Not sure about pricing in this market, but should go cheap. post some pics, lets see it.