OK, kind of off the map for you guys, but I have moved to OKC from Houston for work, and it's been a pretty easy transition, even though the city is much smaller.
But, as far as burgers, I would put Irma's up against any I have had, including Father's Office in LA which I always thought was impossible to beat..
Irma's OKC (MidTown and 63rd at Western)