glad to have you, and a+ on the politeness, i think everybody else has given a good explanation of the forks, but let me give you this piece of advice that im *still* learning.
frames are 1 addictive and 2 and most importantly alot more expensive than buying one with the bits, and if you want different bits, you just sell the old bits. trust me im learning this the hard way.
$350 for a full xtr mtb
on the 97 quantum pro, i stopped counting at 1,000$ usd. I dont even want to know, and i still need plenty :shock: but yeah, other than that it will have my dream parts on it, so thats cool. but then again xtr ere my mtb drool bits.
and im a broke college student!!! i still live with my parents!! am i smoking something... well honestly probably
then again my dad gave me the same advice... and i didnt listen to him ether because i had a burning desire to do it, definately not helped by seeing all the TOP quality stuff here. makes me go wow, didnt even think of that. parts i have never seen before etc. I bought two more bikes since i joined this site!
long story short because i could ramble all day: Enjoy your stay

& your trek, i remember my 850 fondly. passed it on to a neighbours kid for free so that they'd fix it up and he'd enjoy it.