Yesterday I installed a set of All Pro's 3" leafs in my truck, and I gotta say I wish I would have got them a long time ago. I was running the stock 3 leaf pack with an aftermarket add-a-leaf and a one inch lift block. I got the AAL from a local shop and from day one it squeecked and rode way too stiff for my likes (my last truck had the toytec AAL wich rode well with no noise).
The All Pro's ride like a dream. As good if not better than the factory springs. I took a drive down a really rocky road with 6-12" lava rocks sticking up and it rode awesome. They also flex really well also. I have 265/70/17s on factory wheels and I was able to stuff the tires in the wheel wells quite easily.
I didn't go with the expedtion springs as the only thing I haul on a regular basis is my qaud. For me I couldn't be any happier with the All Pro springs; they deffinately exceeded my expectations.