I can possibly do one level of subcategories image count will be a take little bit of performance hit.
Do you think it's possible to give the admin a choice of how many levels should be calculated at the upper level?
For instance via a pull down menu:
0 = no calculated totals
1 = upper level PLUS first sub category
2 = upper level PLUS first two sub categories
3 = upper level PLUS all sub categories
On this way the admin can decide whether the (possible) performance loss is acceptable or not. Would be very handy for me, though...

Thanks! Keep up the good work!
Eric.