COD4: MW is still the best of the series imo. I still play it almost everyday on PS3. Great community, no lag, amazing maps, and just very basic fun (weapons, attachments etc). Nothing to fancy.
Agree. COD4 and World at War were the last two games before they started messing with connections to even out players. It's actually done just the opposite. The lag is extremely inconsistent. At least in COD4 you could pretty much figure out who was host but other than that, everyone else was on an even playing field with your connection playing a little bit of the difference. At least it was highly consistent, unlike the games since then.