TX,
Yikes... 9,000 words and we didn't do enough??
Well we do have a specific list of recommended criteria right at the top: "Recommended Safe Features for Long-Gun Storage"
It was very difficult to do an apples to apples comparison. Fire-proofing, for example--there are no less than 5 different testing labs used by reputable safe-makers.
Size is another problem. You can look at two 60"x36" safes, and they won't have the same volume inside because of different floor structures and different interior/wall construction.
To be honest, I didn't find one brand that had ALL,or nearly all) the features I'd want in a safe.
Sturdy Safe has nice thick steel for the price. Browning has a slick on-door rack mount on its premium safes. Browning, Champion, and Heritage have a bolt retraction system that resists a drilling attack. Amsec has poured concrete insulation that's more stable, structurally, in a very hot fire. Brown Safe offers Tl-15 and Tl-30 rated safes with superior burglary protection. Homeland offers great interior volume for the price.
On a dollar per cubic foot basis it is hard to beat the Sam's Club safe built by Granite for $599.00. But it's unfare to compare this safe, with its thin 12-gauge walls, to a Brown safe with 1/4" thick walls.
I wish I could be more definitive. I'm in the market myself to replace a 72"x40"x28" Cannon safe,it was too costly to move it to the new location.)
I can say this--I'm very impressed with some of the features on the high-end Brownings. But they are costly. I wish we could get Browning to bring out a "premium practical" safe with a plain-jane exterior and maybe rougher welds. If they could sell a 66"x28"x40" with door rack for around $1300.00, then it would be a no-brainer.
But you really have to judge and balance various features for yourself--how important is fire protection vs. Interior volume. Will you have to move residences often in the future? If so, then a Zanotti makes sense.
I think if you look at the recommended features,UL Type II mechanical lock, external hinges, UL 1 hr fire-proofing, 58" interior vertical clearance, etc.) then price shop, you'll end up being satisfied.
The other thing to consider, is much of the cost of safes is transport. If you can find a safe manufactured near you, that can often save you hundreds on the price. There are a half-dozen safe makers based in Southern California, three or four in Utah, a couple in Texas, and another half-dozen or so East of the Mississippi. Find a safe-maker near you, specific the size and features you want and see what kind of deal you can get on a "no-middleman" factory pick-up. I saved $400 on one of my safes by going in with another guy and buying two at the same time, picked up at the warehouse.