What do you guys think about the new Engl Fireball 100 E635 head?

I wonder if the rhythm channel is as good as the Powerball's...

It's not.

Plus it only has one shared eq which is a bummer. It does have seperate gain knobs but that just doesn't cut it.

The sound of the channel is not that far off compared to a powerball but it's the practical part that is a pain in the ass.

IMHO, you're better off buying a used Powerball or maybe even a used Savage 120 if you can find the benjamins.