I just bought a Cadillac Weber to replace a Cadillac Brinkmann. Brinkmann went out of business about a year after i bought it and you can not get oem parts for it. So this time i spent more to get the Weber. The Weber has a 10yr warranty, which is awesome.
I use a Coleman Roadtrip 285 and a small Coleman charcoal smoker for tailgating and camping.
Also have a nice 44 in smoker to do the low and slow at home.
Bottom line, parts and warranty aside, a grill or smoker is only as good as the operator. But for longevity, you get what you pay for.