First of all, don't listen til migo. Baldur's Gate has aged REALLY well. In fact, it's not more than 4 months ago that i played through Baldur's Gate 2 and ToB again, and now i will have to again soon. 2D graphics age amazingly well, and since Baldur's Gates environments are all hand-drawn they still look fantastic.
But as already mentioned in the thread, if you plan on playing Baldur's Gate (the original), get BG2 as well. The original Baldur's Gate runs on an older version of the engine, which restricts it to a 640 x 480 resolution. There is a mod, however, called BG1Tutu [http://usoutpost31.com/easytutu/] (or EasyTutu) which, if you have Baldur's Gate 2 installed, can port the entire first game to the second games engine, which allows playing in many more resolutions up to 1600 x 1200. These are however all designed for 4:3 screens, which you can fix by getting the Widescreen mod [http://www.gibberlings3.net/widescreen/] which allows for pretty much any custom resolution, including fit for widescreen.
So what are you waiting for? Go play it!
Edit:
Leftnt Sharpe said:
Baldur's Gate 2 is undoubtedly the better game but the original is still an excellent example of the genre. I would recommend reading the manual all the way through before you play to give you an understanding of the rules. Save often and if you find a quest too hard move on and come back to complete it later. However you should try to complete as many quests as possible because every bit of xp is vital!
Actually, there is a neat little XP trick to gain loads of XP in the original. North of the Friendly Arm Inn is the Anhkeg tunnels. Anhkegs give almost a thousand XP per kill, and it's possible to kill them at a relatively low level. So once you run out of Anhkegs elsewhere, just sleep in the tunnels and they will attack you one at a time during rest.