I've owned and used all the meters you mention but the L308.
The most practical, I think, is the Luna Pro Digital (or Sixtomat Digital in Europe). Compact, lightweight, extremely flat form factor, about the size of an audio cassette tape, uses a single AA battery, very sensitive (EV -2.5@EI100).
However practical, sleek and elegant it is, my real favorite is the Luna Pro SBC, but is so huge that I never carry it "on the road".