I'd like to have Angrist, the knife Beren took from Curufin and used to cut the Silmaril from Morgoth's crown. I mean, how much more awesome can one knife be?
I'd also like to have one of those short swords the hobbits got from the barrow. It'd be almost unstopable by any servant of Sauron (save the Ringwraiths, but then I wouldn't ever intend to run into one of them) and it would look awesome. Come to think of it, I'd like just about
any weapon from Tolkien's writings. I have this obsession with shiny sharp things...
