I highly recommend the travelpro flightcrew8 22". It has a great built in section that holds suits...and they don't come out wrinkled.

http://www.amazon.com/Travelpro-Expandable-Rollaboard-Suiter-Size/dp/B003H4Q06O/ref=sr_1_fkmr0_1?ie=UTF8&qid=1329432361&sr=8-1-fkmr0