Thanks for the help, everyone. I was concerned that the smaller machines would not be able to clear the size trees that I need, and would end up having to hire the work done anyway.

Meadowlark, your 450 is a 60 - 70 HP machine? I can find lots of the smaller dozers in the 10 - 14K price range, but the next level up (Case 450 and Cat D3) seems to jump to at least 20K for a decent used machine. There's something magical about 20K that makes me NOT want to spend.

Guess I'll just keep hiring my projects out to the local contractors. In my area, I've tried three different ones... only one of the bunch would I use again. Luckily, he was the one I used for my big pond expansion and he did a good job.