Personally I graduated from a bare-bones Kubota diesel Super, to a nearly-loaded Cat powered Super in '06. I was amazed at a few things:
1. The Accuset, especially when sawing odd sizes of stuff, makes every cut go smoother and faster. No creating custom scales or figuring out, say, where to start to cut a cant into full size 1 3/4" stock or something. I had a friend recently who just saw us cut at a show for the first time comment that we look very "smooth" when we saw. I figure that has to be a good thing all around.
2. The Autoclutch both saves the arm big time (heavy diesel), and with the Accuset takes considerably less concentration than the manual handle. By this I mean a flick of two switches and my head is in gear and at the right height for the cut. About a second compared to maybe 5-10 seconds?
3. I like Lube-Mizer, especially when sawing very sticky wood and/or using expensive fluid in the winter time.
4. Debarkers are awesome for lots of dirty logs (but everyones logs are clean, right?).
5. Edgers are awesome (but thats a different story...)
It really boils down to how much you are going to use it. Ive likened it to a car: if you are going to drive it all day every day then you want air, cruise, tilt, etc. A base model is fine for driving once in a while.
For a used mill, I'd echo the two-plane clamp idea. I'd avoid the old Setworks and look for an Accuset or Accuset 2... Im also a big fan of diesels...
