well it is extremley hard to say because they are all brilliant. I dont know much about drums but for bass guitar Symphony X are the most talented band in that area.
I'm fairly new to symphony x, but i was immediately impressed w/jason's drumming; his hi hat/ride work is especially unique in his genre. He's also got the required blazing double bass work. I think he and lepond are both great musicians.
watching Jason and Lepond live as a rhythm sections is like watching sychronized swiming that someone recorded...and then speeding the tape up to x30........