I'll save you 70 hours for Witcher 1: go read and view the game somewhere else lol. And if you do play it mod it out. The interface is horrible, the game is jank, but the story is good.
Nah, play them all. I mean, if you're gonna do that, skip W2 as well then.
I actually preferred W1 in a lot of aspects.
Get Flash Mod
http://ifrit.pl/projects/flash-mod
http://www.moddb.com/mods/flashs-the-witcher-mod