I use an S1000 with my MPC3000.
The S1000 can be used for looping samples for tails and creating synths that sustain whilst you hold a key/pad. Also, I use the multi-loop points to create glitchy loops for a bit o' glitch funk stutter bizniss.
It much easier to play samples across the entire keyboard range.
There are a lot more modulation options, including Pan Mod and Pitch Mod.
You can spread multiple samples across the stereo image exactly as you wish with the key groups.
'Velocity to Sample Start' is great for stereo widening when you apply different values to different samples with different panning.
I constantly use it for resampling. e.g. If I have a badass stab coming from my MPC3000, distorted through a mixing desk channel, with a touch of reverb and a big slap of stereo delay... I'll sample that into my S1000 and then sample it back into the MPC3000.
Sampling hot into the S1000 can sound good, especially on drums... it can clip nicely.. but you don't want to hear about how good the S1000 sounds right?
Well, lemmie just say... the S1000 sounds better than the MPC3000! Crispy with better high-end, sounds brilliant and when pitching down.... and more. It does lack a good filter though.
You really can overdrive those sounds and it sounds good in the S1000. Also, join one sample on top of itself, boost the loudness for a big, hefty, good-sounding volume increase.
Time-stretching sounds proppa old school good.
With a scsi drive connected (i got a scsi CF reader/writer in the floppy bay on mine) it's so easy to scroll through and organise all your partitioned samples with the screen and disk menu.
Also, I can take the CF card out of my S1000 and put it into my MPC3000 CF reader and the MPC3000 will read the S1000 CF card!
I don't do that often though because I always prefer to sample instead of transfer... but it's an option. The MPC also reads S1000 floppies.
You can also use it to verify any floppy disk you have because it tells you if it finds any bad blocks on a format. (I have both a CF reader and the floppy drive fitted for this purpose).
I got the DIGI card in the S1000 which enables you to backup, through S/PDIF (TS - phono cable), into your computer. You can also sample into this digi card through a 44100Hz or 48000Hz digital signal.
Again--> it sounds fantastic.