I'm looking to upgrade current mower, 61 scag freedom z pro for just my own property of 2+ acres. My debate is do I go with a faster model or a 72 deck? I'm looking at JD b/c a dealer had a dump from seat collector that I need for leaves. 930M is rated at 10mph, 930R at 12. Will this really make a difference or do I just get the wider deck? Deck upgrade is a lot cheaper than jumping up to R series. I just want to get done quicker!!