My wife and I decided to make an investment in our luggage. We had purchased a 5 piece set for 99.00 and it quickly fell apart. We were regularly traveling between SE Asia and the US so on one of our trips back home we purchased some Briggs and Riley (http://www.briggs-riley.com) pieces. Definitely on the expensive side but their warranty is easy to use. We've had a couple of pieces damaged in transit and they were repaired and returned in a few weeks.
We also have used a few of the cubes but had more success with the garment folders.
If you're traveling regularly, I would suggest the investment into quality luggage with a good warranty.
Whatever the choice, may you have many adventures in your travels. 4951