Well, I've owned quite a few pontoon boats/catarafts. I have a 9 ft Steelheader and a 16ft Aire cataraft. I'm afraid to burst your bubble but you won't find a better boat for less then the Steelheader. You move up to longer tubes and you're really talking money. Just the tubes alone for my 16ft cost about $500 more then the whole package from Skookum. You want top of the line tubes, go with Wing. There are plenty of other quality tube makers. You have Sotar, Aire, Wing, Maravia, and NRS. Then you have to have a frame built (which Os on here builds awesome frames). You're looking at dropping a good $2800 for a quality frame setup if you know how to cut your costs. You can spend upwards to $3500+ easily if you don't watch where you buy.
As I've said before and Os will back me up on this, you get what you pay for in a cat. If you pay $800 for a boat you get an $800 boat (unless you buy one used, that's where you get the deals if the cats are well maintained). Buy what you can afford, but if you can spend the money at least go with a decent set of tubes (the ones listed above). My Aire is over 10 years old and is in great shape and is holding up well. It's not as pretty as the newer continous curved boats, but holds it's own on the rivers. Send me an email and I'll help you out all I can and also contact Os, I'm sure he'll be posting on here. BTW, are you in University Place in Tacoma or up in Seattle? If you're in UP Tacoma I can arrange for you to see my 2 cats.
Jerry
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you haven't lived til you've rowed a cataraft. Friends don't let friends run Outcasts.