I'd look through both before buying. I looked through a couple of HD5s in Cabela's and wasn't terribly impressed, especially after looking through some Meopta glass. Again, that was in the store, so they may perform better in natural light, and that was just my preference. Others really like the HD5 glass. I also went on to buy a basic 3-9x Conquest for one of my rifles, so I'm not anti-Zeiss by any means. Once you're in that price range, you also might want to look at Leica.
A final thought: the Dallas Safari Club convention takes place in a couple of weeks, and all of the major optics vendors will be there. It's an unmatched opportunity to see the very best for yourself.
NRA Endowment & DSC Lifer