#1's HDR I feel is a tad overdone, but the sky looks decent and like togalive said, you have separated the bench well from the surrounding color of the grass. #2 in my opinion wins for composition, and #3 is a bit crowded, but I get what you were trying to do here. This is only my opinion, and the original images must have looked great on their own. # 2 does it for me, but maybe because I grew up in the fields of the wheatbowl and am used to vast spaces of nothing with the occasional small body of water.