I've got just under 3 acres and am looking to get a new trimmer for residential use. I've been looking at either the dedicated trimmers or kombi units from Stihl. I was thinking about either the 90, 110, or 130 units, but am wondering if those might be overkill and a waste of extra money. I definitely plan on getting a hedge trimmer attachment for whichever one I get, and might be interested in some other attachments at some point in the future. I want something that's going to last and can do the job well, but I don't want to go overboard either. Thanks for your advice.