Hello, I've been cutting my 3 acre lot with a Kubota tractor with a 60" ground contact, mower deck. I've decided I want a zero turn to save some time and I don't really need all that tractor anymore. I'm looking for some advice on which mower to get. My lot is all grass, but has at least 20 trees and just as many large rocks. My 60" fits almost everywhere now. Also, I have a sand mound to cut over. I was originally thinking 60", but if I end up relocating, I think I'll end up with a 1 acre lot and I am guessing 60" would be overkill. Also, any thoughts on AS vs. HP vs. anything else? Thanks in advance.