2019 is a real surprise at least for me when it comes to the chardonnays from the Côte de Beaune and Chablis. Despite the hot vintage, the producer managed to make some really interesting white wines with tension and reasonable acidity. The reason is probabaly the limited harvest.
The quetion is, what to buy? As with red it is important to know ones own taste and when one wants to drink the wines. The Bourgogne blancs are fantastic and perfect for instant drinking gratification or short to medium term cellaring.
With premier crus and grand crus it comes down to how long do you want to cellar and are you prepared to take the risk with premature oxidisation. For me with 1er crus of Meursault, Puligny Montrachet and Chassagne Montrachet , the wines really start to get interesting in the 8 to 10 year phase and afterwards. However is the risk worth it and if one is drinking the whites earlier does it make sense to pay the fare.
With Grand Crus 10 -15 years is a minimum in my mind but here you have the risk of premature oxidisation. Drunk younger you have the power and the richness but that patina of age is missing which makes thse wines realy interesting.
Personally I would look for the top producers Bourgogne Blancs and village wines if the intention is to drink within the next 5 years. For 1er Crus I would go to the likes of Pernand Vergelesses, Savigny-les-Beaune, Monthelie, Saint Romian, in 2019 these appellations have out performed and the prices are interesting.