This sounds like the normal sort of adjustment that is made when buying a new bike. Get your saddle position nailed down (KOPS method is a great starting point, and will probably work); then, if you feel just a little cramped, a longer stem might be necessary. But if it seems like you'll need a stem longer than about 120mm, you should probably be looking at a different bike.

Just my $.02. I'm not a bike fit expert.