How many years of use do you guys gets out of these spendy waders? If you don't get more than 6 years of use from $300 waders, whats the difference between that and buying a new pair of inexpensive neoprenes every two or three years at $50.00 a pop? The benefit of the cheapers ones to me would seem to be that I wouldn't be out very much if I had a catastrophic failure with the cheapies. Is it really worth it? Andy