If all you're doing is bucking it man, you don't need any heavy duty saws or 70cc saws IF they are going to be too heavy for you. Just had to sell a beloved 372XP because my shoulders and neck won't handle the weight anymore (go ahead, call me names I don't care...).
Every year I get a semi load of maple or beech delivered and every year I cut it up just fine with an 18" bar 353 (muffler modded) and just bought a new 346XP which is a great, light, ripazz saw.
This is the wood I get:
353 w/18" bar will cut this up just fine, hang on, I'll go put a tape on the biggest logs......................
..................OK the absolute BIGGEST logs I've got measure 23" and there ain't many of them, BUT, mysaws will still cut it up just fine. That 353 has cut up many, many loads of this since I got it in 2007.
If you're going to be felling at all, go with the bigger saws.........and a good pair of shoulders.
As usual, just my opinion.............got any pics of that wood????? Just curious if you've stuck a tape on it yet.
Art