Yep, the Galaxy's Megascreen is the best I've been to in town. The sound system is decent (not great but decent), the seats are nice and comfy and the screen is friggin huge. I've seen a few of the blockbusters there, LOTR RTK, Star Wars III, King Kong and War of the Worlds.
The resolution is fairly decent too. Its believable enough that on some heavy action shots like the plane sequence with King Kong on top of the ESB I had to look away to get my stomach out of my throat.