I seriously doubt you got an '85 Quadrunner 230 to go 80mph.
That post was seriously painful to read.
Also, I don't know anyone who would recommend a Chinese quad over a Polaris? Polaris is considered higher end than Honda or similar, they have an excellent reputation.
Basically, any four stroke quad (or even trike) in the 200cc-300cc range from any of the big five manufacturers is a good start. Save the big bore thumpers and two strokes until you've got a lot of riding experience under your belt.