A lot depends on what you intend to do with the bow. If you are hunting whitetails, 47# will be plenty. A 4 # increase won't feel like a lot. A 7 # increase will!
That said, I shoot a 46# Kanati and a 53# Orion. Generally, I shoot either one equally well. Both bows are smooth. I can hold the Kanati at full draw longer, but I certainly don't feel over bowed with the Orion.
I think your best bet would be to try a similar bow to the one you plan to buy at around 50# and see how you do with it. A 50# bow will do for just about any critter on this continent. Heck, with a sharp, two blade broadhead and a heavy arrow, I'd shoot anything on the continent with my Kanati!