Aside from the no-brainer "Z" rums (I agree, Che - the Guatemalan Zacapa was much better than the Zaya Trinidad) and Havana Club, I like Appleton Estate Extra – 12 Year Old

I've not had the 21 yr old, but have heard good things. Unfortunately I'm more of a Anejo Tequila and Scotch fan so I typically invest my $$$ there.