I haven't brought any of my past 3 cars to car washes. Always do it myself. Takes a while, but feels good when your done and you see how shiny it is! Nothing will beat the outcome of a hand wash and wax/sealant etc.
I personally get most of my car washing supplies from Detailed Image. They usually got lots of stuff and a lot of review on the site which helps with picking if your new to that stuff.
-ASR Engineering Exhaust - ASR Engineering X-Pipe - Macht Schnell Filter -
-ESS TUNING VT2585-