The company I work for, had 5 Bobcat MT52's, 9 Ditch Witch SK500's, and 7 Ditch Witch SK650's. The SK500's have the best center of gravity for doing any hillside work. The SK650's have the best power, but the highest center of gravity. The MT52's were somewhere in between. The MT52's digging chains are weak, I always replaced them with Ditch Witch's 35K chains and teeth. You have to make sure you keep the radiators clean in the Bobcat's and the SK650's or they will overheat and you'll be buying a cylinder head. Any of these machines are great for tight areas. We had 5 ride-on trenchers, but pretty much stopped using them, except for large common areas or parks.
Brian