I just got a new LX HTII crankset a week ago to replace my damaged RF Next set. Initial impressions are good, the thing is stiff, shifting is fabulous, weight was reasonable, price was right. At $100 less than XT the LX seems the deal of the century, only difference being an slight decrease in stiffness (I doubt anyone could notice it, stiffness determined by lab testing) and 60g more weight. The funny thing is all the increase in weight is from the granny gear and bolts, LX these parts are steel, XT they are aluminum. There's a guy on MTBR that modified an LX HTII setup with new rings and other mods he's not telling about yet to get it lighter than XTR 960.
Bottom line, it's a great crankset for not a lot of money, buy it.