I'm pretty new to this game, so my opinion may not hold much water. But here goes. Obviously cocktails are adding things to your whiskey, so you're not going to appreciate all the nuances of the spirit. My sweet spot for cocktails is 100 proof. I also like Rye in cocktails more often than bourbon, but the same thought holds true. I like OF Bottled in Bond Rye and I just picked up a Wild Turkey 101 Rye that I haven't cracked yet, but expect to be excellent in cocktails. Both of these are under $24 here. For bourbons, I just don't put my best stuff that I like neat in cocktails. I'd never put my ECBP or anything that's been finished in a sherry, port or rum barrel, such as my Angel's Envy, in a cocktail, other than maybe in a Old Fashioned, since there's not too much in there besides the whiskey. Basically, the more complex the cocktail, the more likely I am to just use good, easy to find, reasonably priced 100 or 101 proof whiskeys.