For gaming my favorite headphone is the HD700, easy to drive, great positional audio, bass that doesn't bleed into the mid and one of the most comfortable around. They can be had for pretty cheap these days since many bash them as being sibilant/harsh in the treble but there are many like me that find them really good. A few of my friends like the HD700 a lot more than the HD800, T1gen1 and SR009 that I had a while back. You're lucky that you can drive an hour to a headphone shop, I have to get on a plane for at 4-5 hour flight, LA or SF would be the closest destinations with decent shops. If you want the powerful bass then I'd suggest a Fostex TH series but then they are all pretty "V" shaped in sound signature but they do have decent sound stage for closed headphones.