Hey HairWuzEre, welcome to the BBS!
I'm going to add in that the Yamaha Motif ES series can also do some interesting things, scale wise. Some of the "Non-Western" patches are set up so that you can hit all the microtones. It makes for a weird experience, as you hit two keys next to each other and they sound almost the same, but it's a fun thing.
To be honest I'm not sure how adjustable this is (the manual for the ES sucks), but if you have any questions about the Yamaha feel free to ask.