Josh, thanks for the reply. I'm getting what ya'll are saying and thanks for the advice. I guess from reading many threads on here where it seems like everyone just wants to upgrade stuff, I thought that was the way to go, but I think I'll let things wear out and/or break before replacing parts....other than the grip shifters, which from looking online, shouldn't be too expensive to add, but will I need a new derailleur to run the SRAM shifters?
And one more question...so if I were to get disc brakes and even though my frame has disc mounts, i would still need new wheels? When ya'll say "wheels" ya'll mean the rims, spokes, etc right? Basically the thing that the tire goes on?