I say have it in Dallas for this exact reason. We get to see the best two fighters on the planet fight on neutral ground. Don't give homefield advantage to either man, this thing will sell out no matter where it is!
I still don't think Texas would sell out GSP/Silva.
Dana can charge the most insane ticket prices in Toronto, and go to sleep knowing it will sell out in hours, and he doesn't even need to promote the fight.