Several of our folks have gone with RedOxx SkyTrain and travel carry on only. That bag works so well for them, I am considering getting one although I really am happy with the much smaller RedOxx Sun Chaser.
I have bag envy.
The curious thing about RedOxx is that the lighter the color of the fabric the easier it is to see what is in the bag in dim lighting conditions.
If you are not sure if this lifestyle is for you, I would get the cheaper EBags model and try it out for a few trips.
I would only go for more expensive bags if you are really going to use your bag a great deal and put it to the test of use. A lot of use. Road Warrier use and a lot of car trips as well.