Well I went to my favorite LBS again yesterday shopping for a car rack, which is even more confusing than pannier racks. They have the Jandd racks (Expedition and a lighter one) and they have the Delta Mega XL. The Delta was nice, and verrry light, but I don't think that it would help with heel strikes because of all the reasons mentioned. It was nice to be able to compare the racks side by side. The Jandd is definitely heavier. It was assembled in Mexico. Don't get me wrong I have nothing against Mexico or any other country, but if a product is going to be made in a country with much cheaper labor I would like to see at least a bit of a price drop. I guess the quality of the end product is the most important thing.
Those Axiom racks look nice, I will have to do some research. For the price I think they would be great on the grocery/errand bike I am refurbing.