I have 28" suitcases from the 70 LB days and find it very easy to go over the new 50 LB limits. As a result I have decided to switch to 26".

I have also decided against expandable. In principle it sounds good but again the bag may get overpacked and also unbalanced. For "expandability", I like to carry a lightweight duffle at the bottom of my suitcase; also makes a great laundry bag during the trip.

As for brands, I am struggling with this decision right now (started another thread yesterday, please reply there!). I wish Red Oxx made rolling luggage but they don't. BR discontinued model is available for around 250; Delsey Pro for 175. But I am looking for recommendations and advice for the "best value".