Air Conditioner BRANDS?

I am trying to get quotes on air conditioners. I've heard that Trane and Lennox are good. I've heard that Goodman is not so good? Does anyone have bad experiences with any of these? The Trane quote (includes: condensing unit, A coil, labor, and tax) is $2,491 with a 5 year parts warranty. The Goodman quote (same things included) is $2,110 with a 10 year parts warranty. I'm just nervous about the goodman. Any advice?