I had grip shifters on the Raleigh that started me riding, and honestly, I loved 'em. Some others hate them, but I really liked them. If/when I replace the shifters on my Hardrock, I'll put some SRAM X.0 grip shifters which are both awesome and very affordable on ebay.
Anyway, awesome score! I just gave away some 26in tires that I had doing nothing, or else I'd offer them to ya. Enjoy it!
BTW - if you want some fun, go climb "Indian hill" at Pioneers Park. I did about four laps of it today (in addition to the other 20 miles) and man.. it's a beast!