Choosing a gift

[natsturner]

Hi everyone! I'm particulary new to wine, but I would love to know more. I am currently in a bit of a bind. I am trying to pick a wine for my father's birthday, but I'm not sure where to start. I do know this, he enjoys red wine (I think), he got an Opus One bottle and an Isle of Sky bottle last year. I can spend up to a $100 for a good gift bottle. Any suggestions?

Any help would be appreciated! Thanks!