Your satisfaction with any recommendation that I can make is going to depend a lot on the depth of your wallet and your personal preference as to flavors. The master distiller at each brand of whiskey usually has a "brand flavor" going that relates to the ratios of the amounts of the various grains used in the mash, and the aging methods. A whiskey made with mostly rye will have a different flavor than one made with mostly wheat or corn, for example.
As a general rule within a brand, older whiskeys will be smoother and more complex than the younger offerings. However, a young whiskey from one brand may be smoother than an older whiskey from another. Older whiskeys will also be much more expensive as well. I would suggest going to a liquor store that has a lot of the small bottles in stock (or a bar that specializes in whisky) and tasting a few to see what you like. Once you find a brand or two that you like, folks may be able to suggest other brands with a similar flavor type.
Not that I can find or afford these all that often, but I'm partial to Blanton's, Weller 15 year old rye, 15 year old Ezra Brooks, Gentleman Jack, Makers Mark, and a couple others that escape me right now. I also like Spanish or Mexican brandies and dark rums that are at least old enough to be left home alone.
Mixxers, humm, well the rum sometimes goes in orange juice, but I rarely put anything in with the whiskey. Sometimes some distilled water. If you have hard water, like I do, keep in mind that the minerals in the water can affect the flavor of the whiskey.