I did bmq with one pair of $30 runners, and they worked fine, I still wear them to. ;D The pt shoes they issue you at bmq are garbage, mine actualy hurt my feet within minutes of wearing them. I suppose you could spend $300 on pair of runners, I wouldn't. Just make sure your shoes are comfortable. Also bring alot of white gym socks (yes they can get stolen, everything gets stolen at basic). You'll only be allowed to have 3 or 4 pairs in your locker but you can stash the rest in civie lockup. You'll need them for pt and you'll want to wear them under your wool socks as they get itchy especialy when they're new. Foot powder is also essential, they'll issue that to you but if you want the fancy stuff go for it. If you have chafing problems bring some tight running shorts, you can wear them under your pt shorts. Even if you don't have chafing problems you'll probably get them, you're on your feet alot, the field, 13k march, and drill causes really bad chafing especialy in the summer, that and you'll never get enough time to shower after pt.