<font color=blue>The concern with the R4s is that they will tear up the lawn more. The dealer has recommended that I get the turf tires</font color=blue>

I would go with the R4s over turf tires for jobs you've described. Don't think the R4s will tear up your lawn as much as R1 bar tires would and they will give you much better traction than the turf tires ever will. You'll need this extra traction if you'll be doing a lot of FEL use.