Chaos Theory for me is the pinnacle of the SC series.
Pinnacle of GAMING IMO. Still my all time favorite. Campaign, co-op and insanely good and original MP.
If they would return to SC on a single, fully loaded map, it would make a big difference. Blacklist was better than Conviction in that area, but it still wasn't an open environment to operate in.
Otherwise, it was pretty close and they ditched the drama crap from DA and Conviction. I liked it a lot, but it was no CT.
I would even like to see Double Agent re-done as the PC port always has terrible problems. For some reason the original Xbox version was infinitely superior.
It didn't have the mini games that were so irritating and still had the light/sound meters. Looked horrible, but oh well.
IIRC SC was redone on the PS3(?). On pc, it still looks great to me, just the faces fall short. Can't beat the atmosphere though.