Oetiker clamps are completely stainless, used extensively by Bombardier, more leak-free due to even application all the way round, won't cut into hoses, much stronger than zips, and much cheaper if you buy from the right places.
http://www.oetiker.com/content.asp?l=4&idNavig=25
I know Seadoo charges way to much for their oetiker clamps, but look to the beverage or beer industry for much cheaper pricing.
Common Seadoo sizes are 13.3, 15.7, and 18.5mm. For example:
http://stores.kegconnection.com/Detail.bok?no=306
Or, kegkits.com. It's funny how the home beer brewing suppliers can sell these clamps for about $0.30 each, yet Bombardier charges $3 to $6 for them.
The drawbacks are you need a special tool (about $18), the clamps are more difficult to remove, and you shouldn't really re-use them.
However, even though I now have the tool (which is much easier), I have used end nipper pliers with great success. I have also been careful removing them and been able to re-use them. But they are so cheap, why bother trying to re-use them?