I have found my Bobcat 743 is perfect. It weighs about 5000#, tips at around 2000#, 36hp. I use a grapple with it and can lift most of what I try to load on my trailer. For really large stuff I just cut the logs shorter - but is is rare to find an 8-10' log that I can't lift with what I deal with.
THe S130 is about the same machine, newer with a little more HP.
Larger skid steers have the following disadvantages (the advantages are pretty obvious):
- heavier equipment, harder to haul behind the truck
- larger machines/more HP burn more fuel
- larger machines damage the site more, deeper ruts, etc.
- larger machines have a harder time fitting through gates
There are times I want more muscle, but I just can't justify trading up when I consider the downsides of going larger.