This is my first time reading this thread and I've learned a lot about the differences among offsets. My sig is a link to my rig, AFAIK nobody else here is running a 
Masterbuilt offset - ?? - anyway I got in the ball park for cheap at $125.
I have fewer complaints than many here, regarding build quality. (I used to have a New Braunfels Big Texas with very poor welds, visibly crooked.) The lid seals are drafty and I'm trying to figure out a better fix than folded foil. 
		
		
	
	
It has the usual offset quirks but I love the versatility. I'm glad my cooking surface is three racks that I can shuffle or remove. Because I can raise the charcoal tray in the chamber, I can actually grill like a hibachi, with less fuel.
I've scorched the paint on the firebox lid, but I blame myself for that. Otherwise the paint is suffering from the unit sitting out in the weather since May 2012. But it's nowhere near any kind of rust-through problems. I haven't needed to repair anything.
I think I'll remove the swinging rack mounted in the lid, though. I've never used it, and it interferes with tall pieces like the turkey breast which I recently cooked on the old 
Weber kettle. Butts wouldn't fit, either.
All in all, I'm happy with it.