Sadly I only have Bioshock 2 so I can only give you my opinion on that. I believe it's worth the money, personally I really enjoyed the single player experience. If you enjoyed the first one, you'll enjoy the second. Also the multi-player is solid and will extend the play time past that of the single player.
Sonic 3, Sonic & Knuckles and Zelda: Ocarina of Time.
Only problem might be that I've included collections into the mix. With Sonic 3 and Sonic & Knuckles, I have a original Mega Drive/Genesis copy, both came in Sonic Mega Collection on the Cube and lastly I bought both on XBLA.
Zelda:OoT I have the original, the free disc with Wind Waker and lastly came with the Zelda: Collector's Edition disc...
1) I'm not really proud of any of my S-Ranks mainly cause I didn't find any of them challenging enough to be proud of them yet I'm glad I got S-Rank for Mass Effect. 2) Working on Mass Effect 2, Bioshock, Assassin's Creed, Secret of Monkey Island and Puzzle Quest 3) Mainly Rock Band 2, Beatles: Rock Band and Left 4 Dead 1/2 only cause I really really enjoy them but not good enough to get the harder achievements.