I've been using a standard Weber charcoal kettle grill for 5+ years and it does everything I've ever needed/wanted. From grilling brats and burgers on up to and including smoking Thanksgiving turkey. I use it pretty much weekly for 8~10 months of the year, and maybe once a month the other few months. I tend to favor smoking over grilling, but not enough to lay out cash for a dedicated smoker.
My brother-in-law has a Big Green Egg, but I've never seen it move from his garage... kinda like his '68 Camaro, golf clubs and motorcycle. I might have to steal it from him for awhile to see how it does. Hard to imagine it'll grill/smoke 10x better than my old trusty Weber.
Oh, I should mention that the Weber has lived outside in the weather of Arizona, Wyoming, Colorado and Georgia year round, has survived rough moves 3 times and still looks as good as new... or would if I'd clean it. The stand is a bit wobbly now, but still holds the grill up and the wheels still roll.