This question is for the financial geniuses here at Sajha.  I have noticed there are some.

With the historic fall in the markets, I believe it is time to jump in and buy stocks.  But which brokerage account to choose?

I am a beginner.  I also have only couple of thousand bucks to invest at this time.  So, discount online brokerage is way to go for me.  Likes of Fidelity and Merrill Lynch are out of reach for me.  I am not sure how many trades I will make per month, probably just few to start with until I get comfortable. 

I did some research and three names stuck out the most.

Etrade - $12.99/trade, ranked #1 by Smart Money magazine, supposedly has very good research tools, plus first 100 trades are free.

TD Ameritrade - $9.99/trade, ranked #4 by Smart Money magazine.

Scottrade - $6.99/trade, ranked #9 by Smart Money magazine.

If you have experience with any of these brokerage firms, mind advising this neophyte on which one to go with? 

Thanks.