Stand up boats in the 28 foot range: Saber, Pantera, Active Thunder, Fountain(kind of), Sunsation, Nordic.
The Saber, AT and Pantera are only going to run low 70's with a Merc 525 though. Not sure if thats fast enough. The Fountain and Sunsation will run 80. The 29 Fountain is actually a 26 foot boat. It will be hard to find a blue moter in a 288 Sunsation.
My 28 AT is for sale in the classifieds.