I can't decide between This is This and CFS. This is This has the classic songs (Can U Dig It? Def Con One), but CFS is so wide-eyed and progressive and works better as album. I think because it's so big, the songs, no matter how good they are (Axe of Men!) get a bit lost and become part of the whole.
After that:
3. Looks or the Lifestyle
4. Box Frenzy (<--- It's very good, and the best place to start since there's too much going on in TiT and CFS. "Hit the Hi-Tech Groove" may be their best song)
5. New Noise Designed By a Sadist
6. Dos Dedos Mis Amigos (Hold it, "Everything's Cool" may be their best song. I imagined a song like this in my head for a long time)