Everyone is throwing out tons of faves, or trying to impress. In order to be more helpful, "Best" is a loaded question. Best for whom? For exquisite/rich tastes, best for mixed drinks, best to just have in the "collection" without breaking the bank. Bars have their own nomenclature and system at times, but let's go with these levels:
Well
Call
Premium
Super Premium
Top Shelf
or some variation thereof.
Take cognac... here in the US you can pick up "top shelf" bottle at a store (or glass at a steakhouse) of Remy Martin's Louis XIII for ~$1,750USD or a Hennessey "top shelf" VSOP for $50-60USD.
Sounds like you just don't want to serve the cheap stuff. I've seen enough videos/articles on blind vodka taste tests, and even "so-called" pro vodka drinkers wind up preferring something a little less top shelf... they can recognize the cheap stuff, but the "sophisticated" taste is too oft a fallacy. So don't fret over Stoli vs Grey Goose, or Cazadores vs. Patron. Go with "premium" that's on sale if you just want to carry 'good booze' on hand.
Single malt scotch drinkers have an acquired taste and preference, but won't hold it against you.. should u not carry a super-aged or an islay or whatever. At least I don't... I can enjoy a blend as much as a Macallan 18 or Lagavulin 21 Tequila fans are pretty much "know it alls" with tequila (myself included), but it's more a preference of taste vs quality in "top shelf" range, so it's a no-win if presenting tequila as an apertif. I shake my head at how much ppl pay for that Cabo Wabo shit... to each his/her own.
Some examples below in the vodka range:
Well - Popov (or any vodka in a larger plastic bottle) - $5-10
Call - Smirnoff (or vodka under $10-12 for 750ML, but in glass ;-) $10-15
Premium - Absolut, Stoli, Grey Goose, Ketel One, Belvedere, etc...the usual suspects. $15-25
Super Premium - Stoli Elit, Smirnoff Silver (don't laugh), Effen $30-60
Top Shelf - Kauffmann Private, , Jean Marc XO, and I'm guessing a slew of small batch distillers... not a big vodka drinker here. $100-250
Easy drink trivia 101 - mostly all vodkas are from grain, not potatoes (it will state on the label as a "potato" vodka).