not sure if you'll actually have a choice, it might not be the player, but the movie on the disc. usually film is shot at 24fps,... so when buying a blu ray player it won't matter, you'll get great high def for sure. make sure you use an HDMI for the connection, it's a digital connection, go middle of the road for HDMI, the cheap ones are exactly that.
enjoy and don't forget, if it doesn't play a disc, you might need a firmware upgrade...