Well its finally time to get a new derailleur for my old '98 Moab. I've been running the LX that came on it since it was new and its past due for a replacement. I got it sucked into my spokes about a year ago, and it hasn't quite shifted the same since, plus the pulleys look like my dog chewed on them. So I am looking for some opinions here on what to get. First of all what am I going to gain by getting an XT derailleur? What is different on that from the LX? Would it be worth it go all the way up to XTR? How about getting a used one? I've heard that the old shimano stuff is better than the new stuff, would a used XT or XTR be better than getting a new LX for about the same price? So many choices!