This is getting stupid. By stupid - I mean me recommending Dave and Taylor fics all the time. I'm trying not to recommend ones on livejournal, because I know you guys have probably read them before or something. So...here's another one.
I found it quite a while back. I think it was the first D/T fic I read actually. Not on LJ. Weird.
Check it out here. [Edit - the link won't work for some reason. Search for the Foo's section. It's in there.]
My review of it? Weeeell - the plot is awesome, not too cliche or anything. It mentions the X Files. And it's definitely believable. Or at least, I thought it was. It has angry Dave who punches someone. That in its own right is something everyone wants to see.
Chris/Nate fic here.
This one got me into the pairing. Jealous Chris can't be passed up. I'm addicted to jealous fics, they really make my day. It's a LJ fic, so you've probably read it before, but honestly, it's my fave for those guys so far.