Which Backup flash gun?

[Y15HAL]

I already have a Nikon SB900, and want to buy another as a backup.

Question is, would a SB600 or SB800 be OK, or should i go for another SB900? :shrug:

 

[trevorbray]

I always figure a back up should be at least as good as the one you're using. SB900 !
At least you know you've got it covered.

 

[Y15HAL]

True Trevor...

But i was thinking maybe there wasn't much difference between the SB8-900..... so thought i'd ask the question...

After doing a little research, it looks like it'd be better to go for the 900 anyway, being more powerful and also, easier to function....