I make west coast mob type beats,and i feel the mpc(the worlds best sequencer) has nothing to do with sounds thats just comes in when your talking about sequening and sampling.So here go a list of modules and boards with hard sounds.
Roland JV'S,XP's(ect)
Korg trinity, triton
Nord lead
proteus 2000
thats just a start but if you have skills you can make a hard beat on just about anything,its not the equitment that makes raw beats its all about the talent & the skills.