If you already have EZDrummer, I highly recommend getting an expansion kit. The Nashville is very good (and not just for country). I also like the Classic and Claustrophobic a lot. The new Rock Solid sounds tasty, but I've not got it yet. If you don't have EZDrummer, then it's worth the investment.
Don't judge EZ by the stock kit, the EZX are far superior. I can't remember the last time I used the kit that comes with it.
They sound great out of the box, and come with some fantastic grooves and fills played by good drummers. I don't tend to use the loops as I play drums, but they are very good and varied. I genuinely think it will fit your needs perfectly.