I'm at 130 Hours at the end of disk two. But that's with tons of grinding, Tiny Metals, Immigrant Town, etc. Going for it all. Not even close to the bonus dungeons lol. It just depends on how much you want from the game. The experience is much too EPIC to rush. Although this is my second play and my first play was +200 with probably half of what I have now lol. Hours are really irrelevant. =/
Just take your time dude. You still have a few lands left. If you don't want spoilers, you can look at Shadowwrym's FAQ Table of Contents. He has each land denoted with a letter of the alphabet. Cold Flood, Hot Stone (Hamilia) is letter O out of A-V.
So you still have alot to go (just on disk one), so take your time... And... Get good grades. Best of luck to you, friend. (In DWVII and School)