I'm from Tulsa myself, but I do hear that all the big stuff going up these days is all in Edmond...
Given what I know about the Oklahoma beer market, I'd say you've picked a good city for a restaurant/bistro, but not a brewpub. Keeping in mind that most of those people who are living in those 4000 square ft houses are wine drinkers, my advice is to do whatever you have to to get them in the door for the restaurant first...your beers can come second.
With Tapworks not so far in Bricktown, I'd set up shop at the bar and see what people in the area are buying. Last I was down there, Boulevard wheat was going strong, but there was some interest in Bridgeport Pale Ale as well. American wheat beers are popular in the state, so I'd definitely get one of those on the menu. Just look at how well Choc has done over in Krebs! I like the steam suggestions as well, Anchor has long been popular in Oklahoma.
Also, if you can mimic Rogue's Hazlenut Brown I'd say that could be a winner as well.