hi, I own a Fantom S and a MPC 4000. I also have access to a fantom X from time to time. If you get the X you will have a very powerful combo with the mpc. Sampling on the fantom is easy and so is learning how to use it. Just know that a fantom x with various srx cards is going to give you some of the best sounds around. If you are not a pianist then the beauty of having pads means you will be able to tap out your recorded chords and other sounds. I play piano and find it wonderful to simply record the chords then play them how I want to via the pads.
The sequencer in the X is better than the S in terms of timing. However now that I have a mpc I am using that to time everything. For years I slept on the mpc's because I just didn't need it. Now I see that I should have tried it out earlier. The pads on the fantom are hard. You can play them for sure but they are not like the mpc pads.
Just so you know...
Fantom X is 128 polyphony, color screen, audio tracks
fantom S is 64 poly...many of the same sounds as the X. It has optical in out(but only two track)
Sonic Cell is 128 poly, holds two srx cards, has a few newer waveforms than the X but generally has the same sounds as the X but no sampling and no pads.
You may only need the sonic cell.
Drums are the same in the fantoms and sonic cell you will need to layer them as they come to you kinda thin. However the SRX cards have great drums. Once layered they are okay. They are not like yamaha drums.
The Fantom G I won't mess with. Would rather have a Yamaha XF or a kurzweil.
cheers,
ian
http://www.youtube.com/watch?v=BJcyGwJGUak