For wedding photography I can see the wires and hanging battery being a PITA. I shoot predominantly wildlife..already carrying a ton of gear. And, the sync cord to the bracket mounted flash is already there, so one more is not big deal.
I have the Nikon SD8a battery pack for my flash wanting the same thing with fast recycle times. I found that the battery pack can recharge a full pop on the SB800 in just over 1 second. Then I ended up getting a great deal on a used Quantum Turbo and had to spend another $50 to buy the cord to connect the two. With that set up, it didn't charge the flash any faster than the SD8a. The size of the Quantum is not conducive to carrying around for a day of wedding.
What I learned is, go with the SD8a with rechargable batteries for the flash and power pack. It's fast, light, compact and cheap compared to the Black Box or Quantum. You can always carry spare AA batteries but I've never had to change the batteries from the pack during a day of shooting as most times, the flash isn't putting out maximum power.
As mentioned above ...I like the Black box or Tuxedo by www.aljacobs.com
They do not burn up you units ....recycle is faster than batteries & lasts along time....Quantums are great too ....but you pay alot more $ for fancy packaging.....(the Al Jacobs batteries do use the Quantum cord & he does not sell them). If you want to see them I am in Hicksville ...a photo studio on Old Country Road
Larry, thanks... I might pay you a visit to see them. Size and weight are issues, but cycle time and charge duration are paramount.. I'll reach out if a visit seems like it might help me decide. thanks for the offer!