all of these places r nothing compared to my favorite. (being funny here) for me its Blake's Lotabuger. its only in New Mexico but i was born in Albuquerque, so i know about it. Double meat, double cheese and Green Chilli. here's the site for it http://www.lotaburger.com/menu_takeOut.php
Aaand the best burger I've ever had was at my roomate's Grandmother's house:
home made grilled burger ontop of a grilled portabello mushroom with melted asiago cheese, a slice of tomato and a slice of onion. No buns. The mushroom acts as the bun. Obviously eaten with a fork and knife but DAYUM is it delicious!!