I'm in the same boat as the OP, and this thread is quite enlightening.
There seems to be a lot of disdain for even touchless wash places, so it looks like onr or ecosmart is the way to go.
Does anyone have experience with using this
http://www.chemicalguys.com/Waterles.../wac_707ru.htm
and
http://www.chemicalguys.com/FULL_FUN..._p/acc_117.htm
together to wash the car?
It claims to be able to tackle the grimier cars (unlike ONR), and it seems cheap enough. What do you guys think?