BIGBORE577
Addicted to ArboristSite
Well if you're thinking you want a 70cc saw, get the 7900. It's as heavy as the 372, but with a lot more power. I think the 7900 is the best saw in it's class hands down.
Better yet just buy two saws, as you're going to end up with more than one anyway. One for limb work (5100) and one for bucking (7900) .
I would tend to agree with all you say above.