we also have a 6.3m ocean pro, with a 140hp suzuki, and achieve 40 knots max, irde is excellent, loves the rough stuff, exceptionally dry ride, hull grips very well, and lands softly! its a true rib, not being the best on finnish to eg console etc, but built to take some hammering! highly recommended!!!
quality is fine though, excellent in fact, and just because its functional and sturdy doesnt mean its always the prettiest finnish, however saying that i think its a dam good looking boat!
i would have thought with a 150hp on the 6.5m you should get not far short of 40 knots, and on the 7 metre, maybe 35 knots, thats a guess though!