I've got this project in the back of my mind and have the Energy Suspension ones eyeballed. Reason is, I try to shy away from big-corporation stuff. Moog was bought out by Federal-Mogul and many people say they're not as good as they were. They probably are still fine but I don't like giving money to big monopoly-style corporations. I also don't like companies that change hands frequently, I have more trust in a company that holds it's own and doesn't get bought out or go bankrupt. Federal buys these companies up and they just don't seem like they produce quality stuff. Sometimes all that's available is a FelPro oil pan gasket or Sealed Power rocker arm but I do try to avoid it.
From Federal-Mogul's website:
Federal-Mogul aftermarket products are sold under a variety of power brands, including, but not limited to, AE® engine products, ANCO® wipers, Champion® spark plugs and wipers, Fel-Pro® gaskets, Ferodo® brake pads, Glyco® bearings, Goetze® piston rings, Moog® chassis products, National® Wheel End Components, Nüral® pistons, Payen® gaskets, Sealed Power® engine products and Wagner® lighting and brake products.
Anyway, rant over... Go with the Energy Suspension. I think any bushing will have a hard time sitting that close to the catalytic converter so make sure you pound the rivets out rather than pulling the axle forward enough to get the bushings out. This way, you can replace them again down the road.