On the pump, I'm going with croscoe. I have a mountain morph, just used it last week and it can push a lot of air quickly. Nothing against CO2, but not having to worry about refills is nice. If you can wait a couple days for shipping, I think Nashbar has them on sale.

As for Creatine- I've never used it, tho a lot of friends have or do use it. Never been much interested in it, as I'd rather be leaner, and those guys all bulked up quickly with it- but they say they get a lot of energy from using it. I take it you're trying to bulk up? Oh, one thing they are always saying in response to 'creatine is dangerous' lectures...if you use it, drink a LOT of water.