FIA is pretty top notch as it focuses on options and futures. The vendors there are pretty top notch. No red light/green light crap. There are some hedge funds that will be there and groups that help fund traders. So bring your business cards and track record! Plus it's great to see the new top of the line software out there and of course meet other traders.
BTW, I have a way to get free passes to the expo if anyone is interested.