Todd, if you do a lot of low-light photography, you might consider something else besides Westons - they're not too sensitive - with mine (Weston V), about the lowest I can go is something like 1/15, f2.0 on 400 ASA film. I don't know about the Gossen Digisix that Walter has, but it looks nice, it's small (a plus!). Only drawback, I guess, is the construction quality (plastic, not very durable). I don't have one, and all of the above I got from reading various Web resources (like Karen Nakamura's site). Maybe Walker could post a small review once he gets familiar with it, and after some "real-life" tests...
I'm also looking for something more sensitive to use with my meterless Leicas. Weston V is excellent and very rugged, but not very sensitive - and I do a lot of available-light shooting.
Personally, for this purpose I'd be very happy with a a used Quantum Calcu-Light XP meter - it's probably the most sensitive low-light meter you can find 🙂 It's not made any more, and you can find it used only, usually betwen $50 - $100, depending on condition and any attachments with it (fiber optic probe, etc..).
Still looking, though... 🙁
Denis