I'm actually partial to how Plasti-dip looks, especially on our bowties with the texture they have molded into them. I did mine just in time for the GM Silent Cruise this year (Wednesday before the Woodward Dream Cruise) and my friend who was also there was really impressed with how the texture looked with the matte finish. It also goes down extremely even, so it really has a nice surface finish.
The steel wheels on my Cobalt and Cavalier are/were plasti-dipped, and I never had an issue running them through the high-pressure touch-free car washes. I did the grille on my brother's '01 Century and he hasn't had any issues, either (though I don't know how often he gets it washed in the winter), so I wouldn't be too worried.
I will say, I did not like the glossifier much - and it does wear off within a year or so. The aforementioned Buick grille was something I sprayed with the glossifier, and it always felt tacky - even months after, with a wash and wax. It's since gone away mostly, is no longer tacky, and now just looks like mostly normal Plasti-Dip.