i bought a Lone Star Grillz 20"x42". Couldn't be happier with it. Each one is made to order and you have to wait a bit due to the amount of orders they receive. But cooks and keeps temp better then any offset I've run. Its even bumped my Humphrey Battle box ( insulated box smoker) to second choice on most cooks. Not cheap, but not the most expensive either. Build quality is outstanding.
Larry