I've always liked the luggage the flight crew use, it's attractive and durable, with great features. (This is different luggage than the "consumer" TravelPro products.) Plus, with a price under $140, you don't need to worry about a warranty.
http://www.crewgear.com/default.asp?...&WCE=TPCREW22N
http://www.flightattendantshop.com/p.../nid/6/pid/469