Given the price point, I'd start here:
http://www.amazon.com/High-Sierra-Po...dp/B007E6GGGU/
or:
http://www.amazon.com/High-Sierra-Ou...dp/B00COBKU5I/
I'm not a big fan of the T-shaped handles many rolling backpacks have, though I know they do save space. These both have full 2-bar pull-handles and plenty of space. The second one is also surprisingly light.