Can I just make a couple of points in favour of my banana coloured baby chair
You do indeed sit high up, or at least higher than the average float tube. This has a couple of advantages. less of you is in the water which means that it is warmer, much warmer. Casting and retrieving is much easier with your arm hanging downward from the shoulder rather than being forced upward. This extra comfort makes a terrific difference over the course of a day. I have fished from most other tubes and the fat cat is by far and away the most comfortable. The seat is big and flat and doesn't ride up or dig in either.
My other tube is a caddis and the fabric seat cuts right across the back of the thighs. This gets very noticeable after a couple of hours.
The least comfortable tube for casting / fishing from BTW is the Sparton / Shakey. Great if you like sitting with your elbows round your ears
I agree that the Snowbee is too expensive, you can get the real thing for less