For MPC workflow + MPC 3000 DA converters... yes. I think it would integrate nicely w/ my Reason setup. If you have never worked on an MPC you won't get the workflow and fun of using the Machine. I used the MPC2KXL for years before going MPD32 + DAW... I think the Renaissance is best of both worlds. Again, its not necessary, but if it helps you create and is fun... then by all means grab one. I will be.
I also own a SP-1200... and although its not necessary, its nice to run my drums through for bit crunching. They run $2K used... so depends on where your heart and ears are.