I thought I'd post my recent purchase and install of a Zalman VF-700Cu VGA cooler. There are many reviews of this cooler. However, I found none that actually measured clearances for fitting into smaller or HTPC cases. I took a chance and ordered one anyway.
My pictures aren't the best quality. It was actually difficult to show actual tolerances. But I have measured them fairly accurately with my micrometer so others in this situation can have the knowledge they may be trying to find.
The pictures don't show dimensions, so I'll put it below as well for those interested.
Above top of card protrusion: 2.44mm
From top fin of cooler to top of case : 6.41mm (the case has 6.35mm to the top edge of the card)