I have a 26' Scarab 96 model, not much difference in the 97. It handles real and rides well, runs about 65-68(speedo). The boat comes up on plane real quickly with 2-3 people but like all boats if you 5 and a full tank its gonna take some rpm to get it there quickly. The 26' handles and likes the chop and if you like to get airborne it will do it nicely,,,,, after you get comfy on how the to tab and trim it out. Rough water is good as well just don't over trim or you have a stuff comin at ya. Mine is a 502 MPI/EFI and the only problem has been with the fuel system but every 502 MPI in very boat has, the vapor lock situation. Thats an easy fix. If the boat has the factory water baffle system for exhaust get something different. I installed Gil Manifolds, Hardin risers with thru hull exhaust. Build wise the boat seems to be rigged well from the factory. I can't think of any major problems you might have excepting engine/drive problems that will show up in a survey. My main complaint, the cabin. Useless except for being used in the horizontal position.
Now for the 29'. I have rode in them and don't see a lot of difference but I never drove the 29' Myself I can't see why the big price difference. But as they say bigger is better, it has to be right?

For the money if the survey is good you get a lot of bang for the buck. Good luck in you search.