I recently bought Tomb Raider Anniversary (PC version) and really enjoyed it (as i did with Legend). If you've not yet played it i recommend you do so, its currently out for PC and PS2 so you'll be able to rent it if you choose to.

I decided to buy the Tomb Raider games i didn't own (1-5) and found them to be in a 3 for £10 special offer at play.com. If you want to buy them, i have linked to the items below so get them while they are still in the special offer!

Tomb Raider 1 & 2
Tomb Raider 3 & The Last Revelation
Tomb Raider Chronicles

Enjoy :)