Seadoo seems to be a popular brand, how ever I have really ever owned Yamahas. I think if your after something to just run around in, get something thats a 4-stroke as the 2-strokes tend to last approx 100hrs and chew alot of fuel which tends to make a day out an expensive outing. If you consider going for a 2-stroke make sure you check the hours it's done seems like theres some cheap 2-strokes out there but perhaps nearing a rebuild which would set ya back around $1500 depending ofcourse.

Cheers