I also love the spinner wheel bags....but....I really find a rolling duffle so much more travel friendly as it folds down flat for storage and is lighter right off the bat (allowing for more packing weight).
Our family each has one of the following from LLBean, in different colors of course:
http://www.llbean.com/llb/shop/63916?feat=506804-GN2
They come in solid colors or the tropical print. I recently saw plaid prints but I don't see them now at the site.
Anyway, what we love about them is that they fold flat, are easy to wheel (although they do fall over when on their end...hopefully a design flaw that will be fixed), very easy to identify at the luggage carousel and best of all....LLBean's 100% lifetime guarantee. If the bags gets ripped, or damaged you just send it back and they send you brand new one. We have done this over the years and it really is a great guarantee.
DO NOT BUY THE XLARGE SIZE for air travel....you will have overweight fees all the time. We find the large size is perfect for our cruise vacations. I am taking mine for our two week vacy this time.
The site has free shipping for orders over $75.00 now.
MJ