I had a suzuki vinson 500 for a couple of years and loved it 0 problems.I now have a 660 grizzly and a 700 king quad both are excellent machines but I definatley like the king better.For what your looking for I would go 750 king quad and a 450 king but thats just my 02 cents.Three guys at work have the 800 polaris and all have had alot of issues.the new ploarises may be better.all the twins make better power but really use the gas guys I ride with that have the brute force 750 and the oulander 800 are always packing extra gas.It all boils down to what you want to do with a quad unless your into deep mud or water anything in the 400-500 range will do what the big machines will do just not as fast.