I reckon if they made one now it could be absolutely amazing, imagine the features.
The NEW Canon 600 EG
Guide number of 60 at 28mm 100ISO
Auto and manual zoom head from 16mm to 200mm with clip on filters and diffusers.
Secondary flash with variable output.
Rechargeable AA batteries or AA Lithium or a 2 x canon lithium ion batteries.
High speed sync, rear curtain, stroboscopic, etc.
Triggers other Canon flashes
Super fast recharge and multi burst compatible.
Completely configurable bracket for use in heaps of different positions including height extender.
Shutter release button on front of grip with a finger wheel for controlling assigned functions including flash exp. comp.
And all for 999.00
I would love one.
Maybe next year.