I think the last one looks much better. If I were you, I'd do something with that I. Maybe make it the same color as the other text, maybe make it shorter, I'm not quite sure but it seems slightly "out of place". Also, that "Land Maintenance" seems kind of just stuck on the bottom of the logo, it doesn't fit the "theme". Maybe you could make it a grey background with black text or vise versa. Or maybe you could even take the oval out and leave the text black. Overall though, I think it looks quite good, and I'd keep playing around with colors, designs, etc. until you find something you think is just right.