Is the original worth playing today?
I believe they open sourced the code, so there should be many improved versions kicking around.
I was a heavy user of the game, the build editor was amazing. Spent most of my time making maps. Got a couple my maps included on some map cd's that were sold in stores. :P Back in the day, you could kick ass on minimum spec req's, 486-66.
EDuke32 Win,Lin,Mac 32/64bit supports latest video cards.
http://eduke32.com/