Why do you think you need a prop firm?
500 lots is $6250 per tick (on ES).
If you can risk that much per tick, why don't
you just join the exchange and get super low commisions?
yeah i am interested too in hearing about futs prop desks.
i know mav's group does futures trading, although he mentioned very few joined to trade eminis, still it is a solid company and one of the most career oriented i came across.