I run real skinny slicks.
Just to let you know I recommended the Maxxis tire based on what you were used to pedaling, and your big guy concerns. I weigh about 220, and run 1.25 Performance slicks @ 85psi on my hardtail. They are not very forgiving, but they roll fast. I have only had one flat in about a year, but I would not run them If I was using my bike to get to work, I would want something a little more durable, and cushy with a little bit of pattern. I have a set of 2.1 michelins that are made for slickrock, they have a car tire type tread. They roll pretty well.
BB