I shoot weddings in a journalistic/documentary style, using all film cameras (two Nikon F100s). I have been using the SB-28 flash (sometimes on a bracket, and sometimes off), but am considering purchasing another flash such as the new Quantum Q4D, or perhaps a Metz 54. I'm looking for something with more power, which would give me the option of using it for the portraits, as well as the candids (reception, etc.). I like the softer look of the Quantum. My only concern is that, although the new Q4D is lighter, it's still a lot bigger and heavier than my SB-28. Does anyone have the Q4D, and if so, how do you like it? Any opinions on the Metz 54 series? Thanks for your replies!