I think your best bet is to find a cheap S3 around $80 and start mining with that. It's a lot more profitable than a usb stick miner.
If you are set on a stick miner than sidehack has a really good device coming out you can grab and mess around with
The s-3 is stand alone just needs an Ethernet jack and a decent power supply.
In order to make profit 8 cents a kilowatt is good