The general daytrader consensus is that stocks are easier to trade than futures. Also, it should be noted that you'll find faster/more blowups among new futures traders than you will stock traders.

I have only daytraded futures though. If you think you have what it takes to cut it at a true prop futs firm, there are several good ones in Chicago. Geneva Trading comes to mind.

You can also do it on your own but it'll take more discipline and longer to get to where you want to be. 10K is sufficient to start for eminis. Before you start trading real money, simulate your trades(many brokers offer free simulators) and prove to yourself that you can make money consistently.