I find the Digisix a bit too fiddley, too. With it's single scrolling button, it's a real pain to use quickly. When it sold for $99, as it did originally, it was a good deal for a simple little meter, and it's ergonomic drawbacks, cheap plastic build quality and slow function could be forgiven for it's low price. But now that it costs about the same as the L308, I can't see bothering with it.
I use the Sekonic L508 and L308, and love them. The L308 is very compact and very accurate- it's my standard carry-around meter, especially for casual quick shooting. The new 308S is even better than my old B version- the readout is improved, (and basically identical to the larger and more expensive 358 and 558), and the weather sealing is better.
As for the shutter priority function, I don't see the issue. Once you press the button, you get a reading of both aperture and shutter speed, and can dial quickly through the whole range for that reading, or you can do it in your head easily enough. I tend to think about what aperture I want to shoot at, too, but I have no problem getting the correct shutter speed with this meter- I take my best guess, and the take a reading, and adjust the settings on my camera as neccesary. I tend to enter a situation, take a couple of readings, say for highlights and shadows, then put the meter away and set my camera on the fly based on what I'm looking at. For me this is most easily done with the little L308 tucked in a pocket.
