If your not an eye candy junky and just want to play a good game...
1. To enjoy playing it
2. To catch the stories
I'd definetly do it. If I were in the states right now I'd give you my copies so you would not have to try and buy it. I'd get HL, HL Opposing Forces (I think..where you play the Marines), and Blue Shift. All very good.
If you want bad ass graphics, well the game is too old. Still good stuff and great gameplay.