I agree with sailingdog that the comfortable berth should be the priority. I didn't think that Sunsail kept boats for more than 5 years, so how come you're looking at a 2004?
We last chartered a 5 yo 393 in 2007 and the boat was in good condition except for an odor in one of the heads. Next month we'll be on a 423 and didn't feel it was justified to pay extra for their "Premier" boats.
I've got blisters on my fingers