I haven't read any of the replies, BRM, so I'll just throw my hat in the ring without wading through the usual circus.
Find a good used saw in the 70-80cc class. For me, of course, that'd be a 460 (still in production and on the shelf as a current model) or a slightly older 046. There are tons of these saws out there for $400 to $600 in excellent shape. I bought mine for a bit over $400 used.
You can run a 25-inch bar on these saws all day long and gobble stuff up. You can also put a 32-inch bar in the stable and bring it out if you really need it.
So you've got a good 2-saw plan with a 52cc and a 76cc saw. The little saw is light and easy to run and will do you for a lot of what you do. And when you've got bigger stuff, the bigger saw comes out. I will say that if you go this route, you'll end up with a silly grin on your face at how fast a properly tuned 70cc+ saw with a sharp chain and 25-inch bar gets through wood.
I ran that 2-saw plan with my 026 and 460 for awhile, thinking it would be enough. But then CAD struck, and I only used my handyman/maintenance/cabin care business as an excuse to build up the stable.
But a 2-saw plan in those two cc classes kicks ass! Good luck!