Occasional Steve

I didn't like Avernum as much as Geneforge, and I can't make up my mind where Avadon fits yet... All I care about is plot and gameplay. Right now I'm thinking either Geneforge 4, Geneforge 5, or Avadon. But I'm also interested in hearing which game you like best and why.

I've played the demos and have decided to buy the full version of one of these games. But money is somewhat tight and I don't know which one to choose, or if I'll buy a second. If you could only buy one Spiderweb game, which would it be?