SOTAR makes good cats. So does Maravia. But my favorite are Jack's: I've got four in different sizes and have been running Jack's boats for close on twenty years, with never a puncture. Jack (aka Paco) changed my life.
Cutthroat tubes (12' 6" x 16") with chafe strips. Frame is homebuilt. It's a great playboat that handles like a Mini Cooper.
But it can also work for overnight trips:
Just built a new lightweight play frame for this boat. Which I'll test as soon as it bloodywell stops snowing.
Jack's Plastic Welding http://www.jpwinc.com