i have a perfect quad its a fourtrax 250x look at my page it tells you all about it and its for sale!!!!!!!!!!!

 

300ex would be perfect for you man! inexpensive, indestructable, has decent power for a 300 and its super comfortable. and plus even bigger guys can ride that quad. my friends dad rides it and hes like 6 foot. practise on this one till your ready to move on to a bigger, stronger quad like a 400ex, z400, yfz, trx, etc.

 

a 400ex is way too powerful for you mine is stock and does ******* when i crack the throttle wide open and it does over 100mph.

 

the 400ex is not powerful enough to do wheelies by simply hitting the throttle (in my experience) and DEFINETELY does not do 100mph.... more like 100km/h