I went thru the same decision process just a few months ago. I drove the 2710 and 3010 (dealer didn't have a 2910 available that day, but said the footprint of the 2710 was the same). I used a portion of pavement which had a pattern in it, so I could see the difference in turn radius. It surprised me how little the difference was. I'm sure the 2910 is more maneuverable, but the extra weight and width of the 3010 gives better stability. I went with the 3010 and am very glad I did. For the brush hogging the extra weight helps my 3010 handle a 5' brush hog with no problem, even on my steep slopes. I'm still surprised at how much more stable my 3010 is on my hills vs. my ATV 4x4 or simplicity 17hp mower. I have R4's loaded.