Taskbar: I have "Dungeons And Dragons The Master Anthology" from Gamersgate.com. It contains Baldur’s Gate 1 & 2 and Expansions; Icewind Dale 1 & 2 and Expansions; The Temple of Elemental Evil; and Planescape Torment. Pretty cheap at the regular price, and an incredible bargain when on special discount.
The only real problem with it is that the whole package comes in a unified installer which if I correctly recall is 12gbs. So even if you only want to install one game, you need to either download the whole 12gbs installer or copy from the dvds onto which y0u archived it because you have no confidence that these download game sites will last forever.
I'd consider buying Baldur's Gate 1 & 2 in standalone packages for a reasonable price.
The gamersgate pack has the GOG versions of the games. I know because I have it too.
As other have said, just get the original physical versions and mod them as needed. Do not give money to Beamdog, please.