What’s the best Vodka?

My co-worker helped me get a great deal on some home improvement work for my place. As a gesture of appreciation, I’d like to gift him a really nice bottle of vodka. It’s his drink of choice.

I only socially drink beer & tequila… what do you recommend? I want this to be a classy but not an obvious pompous recommend. Prefer to be great by tradition.

Thanks in advance! Looking forward to learning something new.