how do i get/use a drum machine on pro tools LE



ok i have LE6 and i want to experiment with some sweet drums machines and stuff.probly midi stuff. i dont know.i just wants some killer techish like not realistic sounds but like pro drum machine.
so whats some good programs that use rtas?
or whatever
what do i need to look for and specifications to look for.
i just need to know that to look for, and some kinda of practical easy use i can use in my audio projects
thanks for your help