I leveled my Gladitor to 10 last night. I figured I may as well check them all out now that I found out about the nifty little quest at lvl 30 that givees you a piece of blue armor.

My understanding is you can share this armor between alts, change it from plate, to cloth, to leather etc. it levels up with your character till 50. and if you have all 5 pieces you get a weapon to boot.