OK, comfortable old habits die hard but it is time for me to retire the bags that have flown over a million miles and finally get myself a rollaboard bag. Has anyone here done any research or have any suggestions? Are there any lessons learned of things you love or hate about your current bag? Are different brands better or worse, and why? Anyone have a bag they like enough to recommend?

To my specific needs, I know I need to be able to take a suit from time to time so I need something that can accomodate a few hang-up items. But generally, I'm not an organized packer. I generally just throw an extra pair of shoes and a couple of folded pairs of slacks and shirts in my bag so I like having a big compartment I can just fill with junk.