I got a ESI-2000 Turbo and the S-2000 is not in the same league as the ESI.
The built in filters are the s**t once you get the feel for them.
Using them with your MPC2k will easily get you MPC60 or SP drums.
The best part of the Turbo option is the extra routing, SPDIF and effects that are very usable.
The problem is it's cheaper to find a unit with Turbo than add the option.
EMU was selling ESI-2000 turbo units direct for a couple hundred, which was a good deal.
If you didn't get a manual download and print it, you will need all 262 pages.

Now for a warning, the devices that EMU says works with the SCSI are the ones that work.
If it's not on the list you probably won't get it to work.
Believe me I tried a lot of devices that would lock the unit up or prevent it from booting.
Using devices on the list has been problem free; 2-SCSI HD's and CD-rom work everyday.