OK, poll time, the rules
You have $1000 to spend on one bottle, you cant split, cant share it as part of tasting, cant combine with anyone else, cant do anything except splurge on one single bottle of alcohol for your enjoyment no other way except one bottle that you are going to sit down and enjoy. What would you buy and why ?
Well, its hard to find champagne at the $1000 price point, but it probably be a single bottle of Bollingers vielles vignes francaises. Some vintages are still under that price point.
And I’m not thinking new releases. You can easily find mature, excellent bottles of FGs from classic vintages for $1000 or less. And that would include Ausone and Cheval Blanc.
My second choice would be Rhone. Thinking Verset or an older Jamet, Allemand SS. These are more unique purchases than the FG Bordeaux, but I think they also come at higher risk of underperforming and/or bottle variation. My hit rate with well-stored, mature Bordeaux is really high. And it always hits the spot.
Taking the spirit of the OP, I looked for a GC burgundy I wanted to try. $2600. Eek. OK, 1990 Margaux. $1600. 1990 Latour? Score! - $890. 1990 Krug Clos du Mesnil $1600. I chose FG Bordeaux.