[james_gsx]

I would look into a few things first.

1 - How much capital do they give you when you put up say, $20,000.
2 - What percent of the gains do you get to keep? There are some that let you keep 100%, I would lean towards those.
3 - What trading software do they use? Is it their own or do they use someone else's software? For example I know Bright uses RediPlus from Goldman Sachs.
4 - How strong is the firm financially?
5 - Does their style of trading interest you? If it doesn't, then theres no point. If you just want to trade the way you do now with more capital then I would look for a firm that just lets you be.

I looked through that Kershner Trading website and I liked the team trading idea. But if you like to work alone, that might not work. I suggest you contact them and ask to check out their office on a trading day and see what you think.