Bridesmaid Question

Hi guys. I am in a bridal party and the bridesmaids are chipping in to buy a luggage set. What is the right amount of stuff to get? I saw this, and figured maybe add a thing or two. what do you think?
http://www.macys.com/bag/index.ognc

That link doesn't work. But my suggestion would be:

1 LARGE rolling upright suitcase
1 MEDIUM rolling upright suitcase
1 SMALL rolling upright suitcase
1 rolling garment bag

I think most sets come with the suitcase and also with an additional carry-on bag, but I always find those useless. I prefer the garment bag piece instead.