As far as the head goes i would recomend either a Denis Cimaf 180d or Gyro trac toma-ax 500. I have a Cimaf an it out performs my old Fae head two to one hands down. As far as the carrier it depends on how much your going to be mulching, if you plan on doing 75% or more mulching with the machine get a machine purpose built for muching. If your going to use it for movein dirt, logs, landscaping i would recomend a skid steer. But take my advice say away from a Cat machine, I have a Cat 297c it's a good dirt movenin machine don't get me wrong but when it comes to mulching it's always over heating. The ac filter are in the wrong location an the forestry package Cat puts on these machine is a joke. I have a friend runing a asv pt-100 forestry edtion he seems to like it an hasn't had a problem with it. For advice on a bigger machine i would talk to a guy on this forum that goes by cbturf.