I've bought luggage at Kohls.com for decent pricing. It's great when the item is on sale plus a 30% off coupon and free shipping. I prefer to buy online. Sometimes luggage in the stores looks like it has been dragged around and it's missing some accessories inside that ought to be included.
I bought our current TravelPro bags at Bed, Bath & Beyond.com using a 20% off coupon. Great quality but it wasn't cheap.