Russell,
The old tire debate will continue to rage long past your decision /forums/images/graemlins/smile.gif Lots of folks feel that turfs are a poor choice, lots think they're the way to go. Lots feel that bar or ag tires won't hurt a lawn as long as you're not mowing in a monsoon, lots feel they will damage a lawn on turns etc.
I looked at my situation before I bought and decided, like you, that I was going to be mowing primarily with some loader work, driveway maintenance and winter snow removal. I went with the turfs. There have been a handful of times it may have made my life easier to have a more aggressive grip. Overall for my applications, and in my climate, with my soil conditions, turf tires were the best choice.
A search for "turf", "industrial", "bar", or "ag" will likely reveal years of history in the great tire debate. /forums/images/graemlins/wink.gif
Good luck.
Kevin