[Runner]

I agree with all that jdbower said.

I have both a 62D and a Frontier GM1072R RFM (used with a 2520). Here's my list of likes and dislikes on each:

62D Likes:

decent mowing quality
compact dimensions of tractor/mower for storage in shed
fairly easy to maneuver
keeps weight on the tractor wheels (good for stability)

62D Dislikes:

windrows clippings when the grass is tall
mower noice/vibration, etc., right under operator
scalps when going around corners on hills
can't get into corners or under trees
very messy - gets grass clippings all over the tractor and fills the grill up. I have to stop and clean my grille off at least once per acre.
harder to use with three-point attachments or loader
harder to remove to use the backhoe (as compared to the RFM)

RFM Likes:

easy on/off (great for loader/three point attachment/backhoe use)
fabulous cut quality (better than the 62D, in my opinion)
more even distribution of clippings
no mess on me or the tractor
keeps the noise, vibration, etc., behind the operator
can be backed into corners and under trees
easy to service (you can get to the spindle grease zerks and to the top of the deck easy for cleaning)

RFM Dislikes:

weight is being towed and not contributing to the stability or traction of the tractor

As you can see, I've decided I like my RFM better and it will be my primary mower, even if it means using 4WD more often than I had to with the 62D.