Katanas are nice. I used to sell some made of very high-quality steel combinations that performed wonderfully. [Ah, but lightweight...] If you're concerned about weight, you might want to look into some small swords. The blades tend to be thinner, but if they're made of the right materials you wouldn't sacrifice too much in terms of strength or sharpness. I do believe there's some good ones in the weapons shop here.

[Because goodness knows he has enough free time to frequently check on what weapons come in.]