Onoodles writes, “I’ve managed to put away 20k into a Roth IRA. I started it directly through one mutual fund and now I’m looking to move it to a discount brokerage firm to diversify. So my question is, which one is the best?!” For a general overview and comparison of leading brokerages, we suggest looking into SmartMoney’s 2007 Broker Survey from a few months ago. And note that by going with a discount brokerage firm, you’ll likely be trading better customer service, research tools, and trading tools for cheaper fees.