very, VERY nice!
i have the same figures, but not an arena as that. i would like to hear how you made the arena - especially the hex-floor. i see the file available from GW, but did you have any problems you might forewarn us about? of were there things you might do different?
i use a very fast-play and exciting set of Gladiator rules called Arena Games. they were self-produced by some friends from Rochester New York. I lost track of them so i don't know how to recommend them to others, but i do rate the game highly!