Default What type of controllers are you guys using?

So I've never been much of a tablet or phone gamer, but it'd be a waste with so much processor and gpu at my disposal. I just got Drastic and GBA emulators so I'm having a ball playing DS and GBA games. I do wish that I had a controller though. So I'm looking to buy one. Right now, I'm thinking about getting a Moga portable or iMpulse. I could just hook up my PS3 controller but I want a controller I can throw in my bag cause I do a lot flying and playing some emulator action would kill some airplane time. What kind of controller set ups do you guys have?