I don't shoot weddings or enough events a year to warrant forking out the money for a full Quantum flash/battery yet.
I am trying to decide if I should either go ahead and get the Quantum battery or use the Canon Battery pack CP-E4 to give me more power and battery life for when I do need it.
The 580EXII works well but is a bit underpowered sometimes with the 4 AA's in it so the recycle time is slow. I have actually caused batteries to pop getting them too hot shooting fast in run and gun situations. Luckily I cleaned out the battery acid before any damage occurred. But it did scare me.
My thought is that it would be better to use an external battery pack to drive the flash. If I bought a turbo I would eventually replace it with one of the Q series flash heads or something similar.
I use the 580EXii and a 580 for off camera flash for remote outside portraits etc. when its not conducive to using something like my Alien Bees SB800's. I also want to use whatever I choose with the MT-24EX for macro work too.
I am not stuck on Quantum and I know that there are other brands. I am looking for suggestions. Go with the CP-E4 for now, get a true flash battery, etc. Many Thanks.