I think the CM episodes you've listed are probably my favourites too - although I'd add LDSK because I watched the show from the beginning but that was the ep that made me think "I have to watch this show". I know a lot of fans moan about too many "Reid-centric" episodes, and while I do love all the cast, I think that the best eps are where they use Reid's character and backstory because, like it or not, he's a fascinating (and much darker than he seems on first appearance) character and a wonderful way to explore the darker themes that CM enjoys.

I did like "Two Cathedrals" when I watched it - I've been enjoying the West Wing so far (borrowed the DVDs from a friend) but I'm now stalled in Season 5 and losing interest.