ttr6,
Stand ups are definitely more aggressive on the learning curve and require more stamina to ride then their distant cousins, the sit downs. If you pick up a stand up, you may find that you initially lack the ability to really jump and hit the waves the way you think or may want too. But in the end, once you have mastered the craft and if you are really interested in experiencing the thrill of wave jumping, the stand up watercraft is definitely the way to go!
Let me know what you decide either way, we always get a group to go riding and welcome others to join in! We're from the Detroit area and could meet up with you in Lake St. Clair or the river under the Blue
address is
http://www.iJetski.com
iJetski.com, Will You? Tom