Your header says "Bartley Schwarz Flowering Maple (varigated leaves)" except as you can see by the links plantladylin posted above, Bartley Scherz doesn't have variegated leaves so it must be another cultivar. Depending on the kind of variegation, it could be Thompsonii as Danita suggested above but there are at least a couple other possibilities. A photo of the leaves and bloom would help ID it.
Since they originally come from South or Central America, Australia, and Africa, most are hardy down to 7b so yes, you would have to bring them in. Most are pretty easy to root too so you may want to try a few as bckup. I took cuttings of my big one I left behind 3 years ago and it's now as big as my original (7 ft.) My short frost nights take the leaves down but as soon as it warm again in the spring, it takes off again.
