both the Nambawan and the Nangol Noble, and for that matter the Kula, would all fit the bill for that very well, IMO
Fwiw, the closest thing in the kava world to the feeling of one or two drinks of alcohol,specifically the pleasant relaxation effects, would be the Kava Concentrate beverage from Kalm with Kava. It's quite pricey, though, a bottle that you can make 10 strong drinks comes to $20. OTOH if you compare that to say, a drink of decent Scotch, $2 a drink isn't that bad, and you're only going to have one or two of them, any more is pointless as you rapidly hit diminishing marginal returns. However, it will not feel like 2 - 3 drinks, I'm not sure of anything that can do that, but if anything can it would be more like a strong balanced medium grind, like Squanch, Nambawan, Nangol, maybe Bati and Kadavu. Oh, and hey, one of the closest would be that KWK Samoan, now that I think of it, very comparable to 2 -3 drinks of alcohol, in terms of pleasurable relaxation.