I second what Chief said about these mowers. I was very interested in buying one several years ago and just couldn't justify the price. Seemed very well built and should last a lifetime.
I am partial to Gravelys though. Their 30 brush mower is the toughest I have ever seen. You can pickup a nice one for around $200-300. They have a heavy 3/8" thick blade that gives awesome small tree clearing capabilites. Plus in those areas that just have high weeds you can add a sickel bar mower attachment for another $100. I would check locally in the classified ads and go try one out. I have mowed two acre fields with my sickle bar mower and taken down 2" thick trees with the brush mower. Gravelyclub is a large Yahoo group to get more info and help on any questions you may have. Plus if you say you are interested in buying one I'm sure you'll get lots of responses.
Good luck and keep us informed on what you decide.
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