Welcome to the board JONG!
If you plan to encounter streams, mud, or ride in wet conditions, I'd go with Shimano LX or better components. Anything lower (like deore or lower) will only crap out on you and piss you off in the long run.
I wouldn't worry about disc brakes (yet). Avid makes a kick ass rim brake that's lighter and cheaper than discs and, while not on par with the power of a good disc setup, will stop you plenty quick.
At the price point you mention, I wouldn't even entertain the idea of full suspension. You'll get WAY more for your money with a hardtail.
Some models to consider:
Specialized Rockhopper series
http://www.specialized.com/SBCBkFami...uhs9ghe.j27004
Trek 6700 http://www.trekbikes.com/bikes/2004/mountain/6700.jsp
Iron Horse Maverick
http://www.ironhorsebikes.com/products/intermediate/
Giant Ranier
http://www.giant-bicycle.com/us/030....45&model=10772
Of all the muthafuckas on earth, you the muthafuckest.
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