I don't need a leveraged account. I just want to trade with real money.
The Mt. Gox transaction fee is 0.60%. Is there a place with a lower transaction fee?
btc-e is a good choice for low fees.
Currently fees are set at 0.2%, The best available at the moment, although getting money in and out is quite tricky.
You can buy bitcoins through Ripple: https://ripple.com