I always go here, unless there's a donation car wash for the high school band or something similar. Those kids deserve a break, and I don't mind forking over $10 to a worthy cause.
I've never used Buckeye's self serve, so can't comment on that. But the auto wash is great. Not terribly expensive, a few choices, and the fellas always hand dry at the end. I throw them a $5 tip. They're working their rears off, so a little extra cream helps.
If you get the Super wash, you also get a little card they'll sign every time. After six washes, the next is free. Can't beat free.
Buckeye is a sure bet.