I still like the rear foglights even thought 'mericans don't understand them. Used to love the stupid bright ones on the parents Audis always great to let someone know they have their brights on behind you.
Before I sold my 09 WRX hatch, I really wanted the EDM light, but I settled for the just getting a red bulb for the left side. Never did install it but I figure it would have worked pretty well, the reflector design was probably similar or the same. The EDM fog is pretty hard to track down, though as per usual everything foreign is "cool" the people with the stock EDM fog would love to have the USDM reverse light so if you can find someone to trade with it is a good deal.
I didn't like the idea of halving the reverse light power though I need a good view when reversing down my long dark driveway.