in all of your professional opinions, what font has the best (THE BEST) digits?
Which font has "the best" digits in some general sense is really impossible to say - it's really situational. (Says the guy who started the "best hyphen" thread...)
That said, I've always liked Clarendon.

Verlag's solution for lining figures works well, I think.
Ya can't top "Numbers" for numbers.
http://www.typography.com/fonts/font_overview.php?productLineID=100018
I dig the curvaceous digits from the fat didones like Annlie, Falstaff, Poster Bodoni, and Bodoni Ultra Bold.
pattyfab - i always loved the numbers on the american dollar
stephen - bodoni numbers are some of my favs too .. something about the contrast in the stroke weight always makes for great digits
so, let me also pose another question - can you guys think of any more "experimental" fonts with interesting numberforms?
A few from Hughes: Miserichordia, Dazzle, Stadia
More experimental ...
A couple from Schiavi: MonicaDue, Virna
A couple from Schamal: ARS Product, ARS Zero Rate
A couple from Identikal: Sharp, Phlex
A couple from Kóthay: Plexo, Zanzibar
"Numerals" is the authentic moniker for these things. Strange people from another planet like me call them "Numberals, you moron! What's wrong with you?"
Some of my favorite numberals are the units I drew for Sibyl, and the other one I'm not allowed to talk about, but can show:

I have other favorite numberals in Other People's Fonts (OPFs). But really, as if I've got time to round them all up. My criterion for good numberals is, Do they look good enuff to eat? They look like candy or peaches? Right, I'll have 'em.
My favorite number is 425.
so, let me also pose another question - can you guys think of any more “experimental” fonts with interesting numberforms?
Sibyl's numberals are experimental (or interesting, depending on how you look at it), being old style and cursive, which is somewhat unusual for a blackletter font. Most blackletter fonts have lining figures that look like they belong in another font.
If you want something more experimental or unusual tho, try these:

Honestly? I’m in love with Mrs. Eaves’ numerals.
You're having an affair with them? Scandalous!
j a m e s
I'm surprised no one's yet mentioned the gorgeous figures that accompany:
Herman Zapf's Aldus and Palatino
or old standbys like the Garamonds, Jannons and Baskervilles.
David Thometz
I like Carousel:

Hi George,
see also this recent thread: Suggestions for numbers/figures
At the moment, I cherish the figures in a current airline ad.
Then, these are not fonts but lettering, of course.

Florian---those airline ads are brilliant :^) Great advertising design and great. lettering design. Imaginative, fun and interesting. Jimmy Cat "most like!" the first one with the bright colors and music. They could concievably be eaten.
Are you at liberty to tell me what airline / country, and the name of the agency / creative who came up with that artwork?
That sample with Sibyl's numbers was colored in very poor taste. Why cheesburger? Why not use some nice cream like the tuscan?

Cream could be brighter.
j a m e s
James, I believe those are from British Airways’ “Attractive Prices" campaigns by BBH (Bartle Bogle Hegarty as was)
http://www.natl.tv/projects/55
http://www.bbh.co.uk/Europe.aspx
Sorry for the slight diversion.
Tim
Thankyou sir! :^) You are most kind and knowledgable. The links too, they're great.
"Attractive Prices"? It's a very clever concept. I once did an "Attractive Figures" campagne for a large financial client in the mining business. The ad concept was inspired by the partition/drive on my PC labelled "Attractive Women".
j a m e s
It's not a font, but I like the numbers on my antique grandfather clock. I posted pics in this thread.
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