50 grand would be my max
I just shot with someone this past Sunday who has a ~$55k Custom Gold San Remo (K-80). Suffice to say I was sure to stay clear of it aside from checking it out before we began.
I think at $10-$10K you have something reliable, fairly decent looking. As far as six figures?..... I'd have an H&H.
Remember, all things relative, this guy who has the high end K80 is big horsepower. He's not the least bit worried about dropping $55K on a gun, doesn't phase him a bit, super nice guy too.
Also remember, the guys who are usually shooting the far upper end of presentation grade sporting guns aren't necessarily the "best" shooters, just the ones who have a taste for the finer things, which, I can appreciate but admittedly don't fully understand.