I've handled a couple of Therion pieces, they seem to be very well made blades!
I haven't ever fought one, so I can't comment on how they hold up to regular use, but if you're looking at getting one sharpened, that's not going to be an issue for you anyway.
I've also seen a couple of pieces of Therion's armor and that is excellent quality workmanship. If their blades are as good as their armor, they're something pretty special.
As I said above, they have an excellent reputation, I've never heard anyone speak badly of Therion. I think you'd probably be very happy with anything from them. Give'em a try and let us know what you think!