Topic: Bioshock for Mac?

I recently got a Mac (a few months old), and I hadn't even considered buying games for it. Right now I only own a Wii and DS so I'm kinda miss out when it comes to PS3 and xbox 360, so when I came upon bioshock, a game that has been lauded by pretty much everyone, for mac, naturally my interest was piqued. Do you think it would be worth shelling out 50 dollars for, or should I buy some DS or Wii games instead? I was thinking about Spirit Tracks or Crystal Bearers (later this month). What am I to do?

I also have a mac, but I didn't know Bioshock was out for it. As long as my system requirements work for the game, I'll probably pick that up for Christmas or something. I would say its probably worth it over the Crystal Bearers, but Spirit Tracks, I'm not so sure about.

I'm just worried Spirit Tracks will be wayyy to easy and too similar to PH. And Crystal Bearers does look hit-or-miss. Maybe till after it comes out so I can compare