Hours is a very difficult question. Too few hours and the boat has spent a lot of time sitting. Too many hours and you know it's been riden hard. If someone puts 200 hours on a boat in a year, they're probably advanced riders and load it down really heavy and work it harder. I heard that the "average boat owner" puts 50hrs on a boat in a year. If I may offer my opinion, I'd say the "average wakeboarder boat owner" puts 90/year. (this average should include the extreme riders (200+hrs/year) and the mellow riders 50hrs/year.)
Feel the Vinyl, you want it to be soft and supple, avoid a dry hard feeling vinyl. It doesn't take but one summer of the boat sitting in the sun to cause the vinyl to start falling apart 3-4 years later. Tore up vinyl is expensive to fix and really displeasing to sit on.
A lot of Epic Marine (Toyota/Lexus) owners really like those boats. They're fuel efficient, people claim to get 2-4 gph with them. Verses 6-8GPH with the Chevy power plant boats. If I recall correctly they Epic's are 300hp boats, but a new prop can probably make a 300hp boat really functional.
At last, http://epicmarine.com/