Best External Battery Pack for 550EX?

[mickeyv]

I have a Canon 550EX and I want a long duration, fast recycling, external power source. Should I go with one of the Canon battery packs; or with one of the compatible third party packs such as Quantum. And if the latter, which third party pack do you recommend? I will be doing action photography indoors (ball room dance photography). Thanks.

[ghms421]

No budget: Quantum

Budget: The Canons are incredible for the price.

[NVcameraman]

Great battery and fast service. This is way cheaper that Quantums also!

http://www.aljacobs.com/packtuxedo.htm