I have the CT230 with R4 tires and have to be mindful of driving on my lawn. During spring I pretty much used it as little as possible because it was very noticeable where I drove. Also, the R4s can tear up the lawn pretty good if you attempt to turn sharp or break traction at all.
If I had any intentions of mowing with it, I would of got the turf tires hands down. They are noticeably less damaging to the lawn.
I am in the camp that is against loading my tires for the basic reason of not wanting the extra wait unless its needed. I haven't got the ballast box yet, but plan on getting it soon. Its a lot smaller than a mower or box blade so maneuverability in my woods will more than make it worth while.
Most people base their arguments on their own needs. You just need to decide what you truly need and plan to use the tractor for.