The issue is not just the small sample memory it is if additional Style files are loaded then they to fill up the system.
I loaded Reuben’s piano sample which is a Must Do action as it is head and shoulders better that Korg’s prime piano, loaded a couple of others then I ran out of memory.
...
Korg Kross 2...update allowed many additional sounds to be loaded..these sounds especially the acoustic pianos that are imo superior to the standard Kross 2 piano sounds which in turn are better than those in the 700.
Ah. So on the PA700, it is not just the smallish memory per se, but that it effectively becomes even smaller once you load an acceptable piano into it. From the OP's perspective then, it may be worth knowing how the stock PA700 piano compares to the piano in the BK that he's used to, is it necessarily a step down even from that? Or maybe, being techno oriented, piano just isn't an important sound?
Just out of curiosity, with your ranking of piano in updated Kross 2 being better than stock Kross 2, in turn being better than PA700, I wonder where the Reuben falls in that hierarchy. Obviously better than stock PA700, but how does Reuben compare to the stock or updated Kross pianos?
I still haven't done anything with styles personally, I just see in the specs that the PA700 has room for 1152 user styles... Are you saying they use up some of that sample memory too? I thought they were basically just MIDI-style data files. But like I said, it's nothing I've used.
Getting back to the OP, there have been numerous boards mentioned so far as possibilities (Kross, Juno DS, Krome, MODX, PA700), but I'm just not familiar enough with techno to have a sense for which has the better sounds for that genre, which is why I'm not chiming in with suggestions of my own.