SGI or Dell AT101 PBT. What has the better legends?
That depends on your preferences on the font style as well as boldness.
Some SGI cap sets have legends that are pretty much on the same level as the AT101, but then there are bold versions with sharper printing that I've seen as well. I'm not sure which is more common, but I'm thinking bold printing.
I'm not a terribly big fan of the SGI's font. IMO, the AT101 wins out. I know some people dislike the AT101 because its printing isn't as sharp, but that's no problem to me.
Though, if you like japanese legends, you can always go with:
2nd gen IBM Multistation PBT caps (for the Alphas at least). They have scooped F and J keys as well. I don't have a full set, sadly. Waiting for a friend to help me out there.
They would blend well with AT101 caps.