Thanks for your responses guys! I own EZdrummer and multiple MIDI packs. I guess I could have answered my question myself! Same concept..
So far, there's nothing in EZkeys that would be useful to my style of music which is why I don't own it.. (yet)..
Bapu, I just purchased the full version of TruePianos and I'm really digging it. I know it's not real piano samples but more of a "glorified" version of a piano.. I like it though.. Works well with what I'm working on right now (a sort of progressive metal genre).. Thanks for your keen insight as usual!