Regardless of whether or not you stay with TD Ameritrade or get another broker and continue to use TDA for options and stocks, keep in mind that you can call them and negotiate the commission. For 10 to 15 trades a day you should definitely be able to knock it down
If you will be using multiple brokers, you can use a single platform to access them, including quotes, charting and trading:
Medved Trader
For example, can use Interactive Brokers for quotes on futures and TDA for stock/option quotes since the limit on # of symbols is much higher, and trade through to either one as needed.
And though I agree that changing brokers won't make you profitable, you still shouldn't leave money on the table. Even a $4 difference per trade at 15 per day will quickly add up to over $15K per year, so not something to be ignored.
Jerry Medved
http://www.medvedtrader.com