You'll get them together in a pack along with Tactics for about £8.
I started Icewind Dale but lost interest due to less than acceptable (for me) graphics
Baldur's Gate. It's dated, but damn it's good. Just don't be put off by the poor graphics and sound
Other good ones are Morrowind and Knights of the Old Republic.
Thanks! I have finished KOTOR 1 & 2 and Baldurs Gate 2.