I decided to start with the 20-incher. My Marriott Visa cycle closed two days ago, so today is good timing - I bought a $1,000 card. I assume the card gets shipped immediately whereas I gotta wait for the bag (?). Anyway, if the bag shows up within a month, I'll decide if I like it and want a 28-incher to go with it. The promo lasts until April 15th, so if these bags are actually worthwhile, I should be able to pick up a couple more of them. (For gifts or whatever.)

If the bags are junk, I'll eBay the first one and probably won't hassle with more - just wait for the next 10% off Giftcard promo.