[DonDavis]

I have this one and it filled up fairly quickly. But I really like it. Tips the scales at 340lbs, a little heavier than you want.

https://www.costco.com/bighorn-18.46-cu.-ft.-executive-safe.product.100571770.html

As with nearly any safe, decent thieves will tip onto its side and use a saw to cut in within 3-5 minutes. To help combat that, it's in a closet and I drilled holes in the rear and used large lag bolts to anchor it to the wall hoping they'll give up due to time.

My install gives me a place to hole up during a home invasion. Highly unlikely, but worth consideration.