If you're looking for a soft case, the Yamaha gig bag is perfect. Well padded and well made.I got mine from Kraft as a bundle deal for only about $20 over the cost of the keyboard only price. It's often hard to find that perfect fit if not OEM.
If you're looking at another brand, the MODX7 is much shorter than a typical 76key instrument, so check dims .. a 61key bag may be a better fit.
I happened to already have a Yamaha YBNP76 bag for something else, and it works fine for the MODX7. It may not be as well padded or as perfect a fit as the MODX7-specific case (it's definitely a bit longer than it need to be), but it's very light and has enough protection for my purposes. Cheap, too.
MODX7: I got a Gator GTSA-KEY76. The case is just huge relative to the keyboard. Not happy with the size differential, the case is giant overkill. Another fatal design flaw imo is the wheels are not recessed enough, it won’t stand on its end without verging on tip over. SKB got this right on my 4214W (61 key) case, but that case is too small for this board. its going back but i still don’t know what i’ll do for an ATA/TSA rated case. Think i’ll Try out the GTSA-KEY61 - reported specs are its 1/16” too short in length (internal). Maybe the SKB 76 key - its height is reported to be a bit shallow but I suspect that is just the foam padding.
Search continues. Who has tried out soft cases/gig bags? How is the one designed by yamah in terms of padding - it looks a bit thin in pictures but can’t tell. I looked at the Gator Pro-Go cases and their GKB line ... any users?
If you search the net for bundles - you can see what retailers are bundling. This is a starting point - you need to also verify the inner dimensions of the cases makes sense for the outer dimensions of each keyboard.
MODX6 - Gator G-PG-61 Go-Pro (gig bag), Gator GTSA-KEY61 (TSA series), Gator GK-49 (Semi-Rigid)
MODX7 - Gator GTSA-KEY88SL (TSA series), Gator G-PG-88 Slim Go-Pro (gig bag)
Note: if the GTSA-KEY76 is too big - seems like even the slim 88 would be too big. I haven't verified the dimensions.
MODX8 - Gator GK-88 (gig bag), GTSA-KEY88 (TSA series), Gator G-TOUR 88V2 (wood case)
**Inner length of GK-88 is 57.5".
- MODX7 length is 45.06"
Thats 14.5" longer than needed. thats ridiculous imo. even GK-76 is longer than needed by about 6". I asked SW and he told me they hadnt been able to actually check fits on any boards yet because they haven't had enough stock, every board that has come in was already pre-ordered and went back out immediately.
I just ordered the MODX7 bag YSCMODX7 by Yamaha. that will be fine for local gigs, Gator has lines that appear a bit more protective but --- sizing isn't optimal. still don't know what i'll do for fly-in gigs. tbd. some flights I can carry on, others ... I'll take the trusty MOXF6 I guess.