If I were you I would wait till I moved into your new place.Even then I would wait for a few months. Your cats will take time to adjust to each other and then if you move . well it might be to much for them to handle. Cats sometimes don't show their stress for a few months.So every time you change somthing, even something so simple like moving the furnature it will take time for them to adjust. We moved a year ago into our house and I wanted one more cat. but my vet told me to wail awhile till we all can get use to the new place. And now we have Billy.Which I dont know if we will ever get use to.