The RTCW enemy territory got cancelled because the single player campaign wasn't far enough in development. The are going to just be focusing on the multiplayer aspect now and release Enemy Territory as a huge patch for RTCW. So if you buy Wolf you get a huge expansion for free in a few months. If you are going to play DOD buy a retail copy of Half Life and not CS retail. CS is a free DL... and with HL platinum pack you get Blueshift and other versions of HL.
If you have HL download the FireArms mod from
http://www.firearmsmod.com it pwns CS 1.5 imo