I am currently playing a 12th SS against the Canadians campaign against a friend (http://www.the-scenario-depot.com/scenario_details.html?command=search&db=scenarios.db&eqskudatarq=5). We're both mature students, so there's no extra money for new computers to run the newer Combat Missions. Despite the graphics, CMAK continues to be an incredibly playable game. This campaign in particular is simply excellent, although the scale (about an infantry regiment, several dozen tanks, etc) can be a little overwhelming at times. I haven't really seen much in the new game that uses such a large scale.
I still enjoy CMBB too, but I'll hopefully have enough scrilla to buy a new computer sometime within the next few months and step into the future.