anything as angle proof as possible i reckon.
Oh, make sure you practice a whole lot before performing.. get comfortable with whatever you're planning to perform. It'd be a total disaster if some1 spotted you making 'funny' moves or spotted something they shouldn't be seeing, if you know what i mean.
If you have Ultrasmoke 2000, i would highly recommend you use it.
I would avoid card tricks. Try something like umm.. say.. Flow? Wounded? Extreme Burn? Gecko (if you own this, u dun have to worry about the noise)? Anything but cards should be fine, cause i think card tricks are too common these days. Just my opinion.