If it's between BG and BG2, that would be pretty awesome. Also, as far as it being impossible to estimate the length of a game, I don't think that's true. If you google "how long to complete Baldur's gate" you'll see that there are sites that specialize in this type of thing. They keep track of how long to complete main story, completionist, etc. No reason somebody couldn't say between 80-120 hours depending on if you stick to the main quest, do a lot of side quests, etc. I wouldn't look for Obsidian to say "it's 43 hours long".