I like the Nashbar.com Primas. They are a 66tpi black skinwall and roll pretty easily. The compound is on the soft side but maybe that means they're grippier.
The Bell streetster from walmart is a good tough tire but has a bit more rolling resistance due to thicker rubber in the sidewall and a lower thread count. The performancebike.com forte is similar. A fairly tough, thick tire as 27" road tires go.