I have to chime in on the topic of rollerbags...
I have the prettyneatstuff bag and I generally like it. However, I have two main gripes. First, the bag is just too darn heavy. Second, the zippers (my bag has 8 of them) tend to rip off or break; This has to do with the way the bags are stored under the second jumpseat. What's the alternative? I have flown with several guys who have the bag from Costco that costs $89. This is a darned good bag and it's very light. The bonus is, it comes with a lifetime warranty -- just take it to costco for a replacement when it breaks. When my purty neat bag croaks, I'm not sending it in for the $200 overhaul, I'm getting the one at Costco.