I live in DFW.
The Powercat Gameday place Frankie's in downtown is actually a good sports bar. I watched one of the Mavs finals games there last year. They have tons of room and TVs everywhere. The rest of Sundance Square has a great layout as well, Tons of bars and places to eat within walking distance. ESPN chose it for all its broadcasting last year for the Super Bowl and the Steelers and most of their fanbase stayed over there as well.
Uptown Dallas is awesome, but the parking there sucks. There will be way more K-State fans in Ft. Worth and its an easy 20 minute shot over to Arlington on gameday.