I bought an Intellijel 7U 104HP case. No regrets there. They come with a nice sized aluminum lid (the chassis is aluminum also). It's not as rugged as a true ATA case. But it should protect the unit from the majority of road damage. I wouldn't check your synth but bring it as carry-on luggage. It's a musical instrument so there are rules governing it in an airplane cabin. Granted, a briefcase sized device with a bunch of wires hanging out of it tends get a lot of second looks. I was detained in Frankfurt for bringing a Launchpad through security. In Vegas... no worries.
Yep. A few more revisions and some wiggle time and you'll be in the right place to get to where you want to be.