Hello,

 I want to do a little bit of day trading with some Bitcoin.

What site is best?

Btc-e
CoinMKT
Mt Gox
Other?

I will only be trading to try to increase my coin holding so I do not expect to need to withdraw or deposit cash. Only deposit and withdraw Bitcoin only.

Which of these sites is the most user friendly, lowest fees and has the best costumer service?

I'm in the USA if that makes a difference.