Well, if the update is important. Better off getting only Nexus/Moto. Otherwise, devices which are having Kitkat have started coming out only recently, and very few would actually make the cut to the next version.
Offtopic : Any leaks as to what next version will be called. But then, Kitkat was a twist, so even if there is a leak, we would not know for sure..
Offtopic : Any leaks as to what next version will be called. But then, Kitkat was a twist, so even if there is a leak, we would not know for sure..