I did purchase in Dec 2010 and this is why. The only 5 ELK I saw in Oct. 2010 on my CO hunt came single file across in front of me with 10 min left on the shooting clock, on a NE slope at 9kft on a bluebird day. At 100 yds., they fed across 50 Yds into the next woods, in 5 min. First 4 I could tell were cows....time passed and # 5 eased on out and I could not make out what headgear he was wearing! Looked like at least 2.5' of vertical and that is all I could get out of my scope (CO is a No Spike state). I made a management decision on the way back to camp in the dark that I would trade the FINAL ELK hunt of my life for some glass NOW, that would not let me down in the last 5 min of shooting time on a bluebird day. My eyes are almost 70 so I ain't far from that Final hunt....lol
Did my homework in Nov. then drove 200 miles and took my T-3 338WM with a 2008_VX III LR, 4.5-14x50_30mm tube B & C on it to a store that had the Z6 and Diavari's. Got there at Sun set and for 30 min. looked through all 3 every 5 min. at a horse and fence on a hill about 150yds out. Went with the Zeiss Victory FL Diavari 4-16x50T* with Rapid Z 800 Ret.
Cost! I'm one hunt $hort now-$2,228! You get what you pay for in GLASS and coatings. It's an investment in my Grandchildren! Mileage may vary!
Good Luck.