JCPenney, they are always having sales on their luggage (and they also sell samsonite and the higher brands.) I guess it also depends on how long you need/want it to last. I got a brand from there called Protocol. It worked really well for about 5 years with frequent traveling for both my DH and I for work and leisure and held up really well. We can still technically use them (6 years we have had them) but the expandable zipper on the big one broke (so it si always expanded) and I feel that the handle bars may show through on the carry on size one.
My other suggestion would be Elder-Beerman during one of their sales. You can often find some steals there (I just bought a Spinner Samsonite for $40, originally $150.)