Well...
I just went through the "what size Tractor" question/experience myself. You aready have a
B7500. but the thoughts are the same...
I only have 3.7 acres to deal with. I finally ended up with a
B2910 Kubota and think that it is just perfect for my needs. If I had not stopped I might have ended up with a
L3010, but that would have been physically bigger so I think I got what I needed in the end.
One thing that helped me take the plunge bigger was someone telling me [rickjay?] that he had a
B2910 on 2/3 of an acre and was quite pleased with it.
I don't think an
L3010 would be overkill at all on 6 acres if you have a place to keep it and your trees are not too close together.
Pound per dollar you get more with the
L3010. There was a pretty good rebate when I bought mine, so the
L3010 at that time would have been almost the same price for me as the
B2910 [I guess, did not price it].
If your pocket book is able to supply the cash, I would say go for the
L3010 if you feel you want to. It will almost certainly work and be the tractor you can keep for the next 20 years, or longer.
To put it a different way: Overkill? Maybe. Satisfactory for use on six acres? Certainly...unless you have some very narrow places you have to get through...
Well, that is how I see it anyway...
Bill in Pgh Pa...almost...