Upgrade my old bike?
I purchased a 04 Specialized Enduro Comp bike I purchased a month or so ago. I have been riding it as much as my job lets me. One of the usual trails I ride is tight singletrack with a lot of switchbacks and a number of longer uphills. The uphill sections give my overweight (250lbs), out of shape, cigarette smoking body a real work out with a 30 lb+ bike. I also don't need that much travel for the majority of trails I run. I am quiting smoking so I will have some extra money and am thinking of building up my old bike to use along with the Enduro. It is a mid/late 90 something Schwinn Moab Elite. It is a cr-mo frame, full rigid, cantilever brakes, alivio derailleurs, and other stuff I don't remember. I was thinking about upgrading front and rear derailleurs to LX or XT (or used XTR), suspension fork, V brakes, new rims/tires, clipless pedals, and some lighter components (seat, seat post, stem, bars). Am I crazy or does this seem resoanable? Any recommendations on what else or what specific part upgrades? What fork?