As can be seen in sig. I am and have been a Cobalt owner and lover for several years. That said, I feel the Condure line is a little less heavy water friendly than the older 'Classic' line. I had a '79 19 foot runabout, great boat after I replaced the rotten floor, (fresh water boat, 30 years old), now have a '89 21 foot CC, Classic Cuddy. Deep, heavy, stable boat. Solid build, thick glass, aluminum plate molded into the gunnels. Still the same power as the other offerings, Merc, Volvo, Yamaha. I have the base power Merc. 260 Alpha 1. Ya it is a little under powered, cruises at 30-32 kmh rb2@gr5t 3600 rpm, and is a little over propped as I can only get about 58 kmh at 4000 rpm, should be able to get at little higher WOT.
But even after 30 and 22 years respectively, both boats were/are tight, solid and in excellent condition. I would and do highly recommend Cobalt boats.
If you are looking at a 23 foot, the Condessa, which is the classic style cuddy is available with twin screws, up to a 454 engine.