I don't like my tires to be insanely shiny anyhow, just a nice clean look, and I have found the perfect setup for me. I use the Turtle Wax Wet N Black stuff, and what I do to prevent sling is to wipe it on the tires (with one of those tiny tire sponges) before I wash the car, and let it dry for at least five minutes. Then when I'm washing the car I will spray high pressure water right up on the tire, that way it gets rid of any excess. I get absolutely ZERO sling with this method, and it still leaves my tires with a better look to them than if I put nothing on them at all.
I'm sure I could get similar results with pretty much any tire dressing, I only chose the Turtle Wax stuff because it is the cheapest one at my local Walmart. They don't seem to carry it anymore though, so I'll try out something different when my current supply runs out.