I recently ordered a new tripod and head for my Canon 20D. I have a couple of lenses that I'll also use attached to it. The heaviest lens is my 70-200 2.8 IS lens which weighs in at 2.9 lbs. When attached to my body, it will weigh around 4.5 lbs (according to what Canon says). Anyway the store called me back and 'upsold' me to the Bogen 3265 head. But I forgot to ask if I'll have any problems with it holding my camera and heaviest lens (it's being shipped as we speak). Has anyone used a Bogen 3265 with a heavier configuration? Should I send it back?

Thanks!

You should go to the forum section here. And look up the reviews.
Bogen's website says it will hold 5.6 pounds. If you are interested there is the 332RC2 Head,
http://www.bogenimaging.us/

my amvona pistol grip ballhead holds my 1d and 70-200 f/2.8 and it's basically the same design.