While waiting you can scratch the itch a little bit for quite cheap. Works out particularly well if you could use a couple utility items. Although not the Super Nova engine, you can find Novation Remote25 Audio for $50 if you look a little bit, there is a dl on novations site to turn it into an x-station. If nothing else you'd get a 25 full key controller with a bonus synth engine, and the added utility of a midi interface and an audio interface.

A bit better yet. xio25's are sometimes put up for 50 as well. Couple more voices and features. Most importantly a more aggressive filter and distortion fx, translating to the best sounding of that range (a-k-v-x station - uh, xio...). Its also the only one compatible with all the other devices... being the last one made n all.