I've never owned a tractor with turf tires, other than a lawn tractor, but I would think that for dirt work, you would definitely be better off with R4s. If you said you were only going to mow and do lawn maintenance (and really meant it/w3tcompact/icons/wink.gif), then I would think turfs are the way to go. I have R4s and I think they provide the best compromise between traction and "lawn-friendliness". Also, resale may be affected by the choice of tires (not that you ever plan to sell it - but if you ever want to move up to the M series...). I have noticed that resale/tire choice seems to vary a lot by region - maybe weather related?