Re: shopping SRT6's
rip it, don't go away mad. This is just XF passion. These are guys who endlessly debate spark plug heat ranges and wax the inside of their tailpipes. There is a guy on here who details his wheel wells -- the insides -- every summer.
I love the looks and speed of my SRT6, but it will stay stock. I figure it will be worth more (chuckle) someday (prolly not). It's plenty fast as is and is rock solid at 120+ mph, plus it can go over 150 mph.
As far as rust, I always wipe the inside of of the door jams and doors (and hood and trunk) after every wash and I am confident that addresses the problem. That and it rarely sees rain and no longer sees snow/salt.