To answer my own question
Spent time skimming over reviews for the X5.
Generally, reviewers (aka "real" musicians:) ) had a favorable summary given their particular use and time in service.
What I walked away with, is the editor is cumbersome even for the experienced. There were also situations where the unit can play back 4 programmed keyed functions in concert, preprogramed effects for the individuals are loss, with a single effect applied to four output.
Each reviewer had their own work around based on experience.
Think I read that correct.
Most felt the X5 a good entry level, and still utilize it because of performance and broad uses.
Basically all I'm looking for is a unit where digital or analog samples can be manipulated for short looping FX the could be used with Falcon keyboard sounds, laser cannon fire for example, as well as a playback for works from Atari focused musicians.
Ideally the synth would be able to cover several instruments reasonable well to the ear, don't want to dive off into separate drum machines or like, the set up will always sit in the same location in a small Atari room.
Tools I have with dongles are Cubase Audio, which is prolly over kill, and Zero X. An FDI and FAFA8, MO4 expander.
Think the X5 may be a bit over my head