I'm going to be the jerk here, because that is kind of my lot in life, but also because understanding what to expect from spirits is a good thing
Smooth, isn't a flavor, and all Alcohol will have some burn to it.
No matter how much you drink or how used to alcohol you are, the first few touches of ethanol on your tongue will have some burn. That's just a natural physical response to ethanol. Ethanol dries out cell tissue and will cause a tingle or astringency. That quickly will go away after a sip or two. Just know its always going to be there. Take a first taste roll it over your tongue breath in through your nose while your mouth is a little open and let that go away. Then try another sip. After a few, you'll start to actually get the real flavors of the spirit. Most of what people call "smooth" are things that are so diluted that you've dulled the ethanol burn (as well as the cogeners that actualy carry flavor, or things that are full fo sweeteners like many rums or flavored drinks.
Instead of any one product, I recommend seeing if you have any spirit enthusiast friends or a good whiskey centric bar around and sitting down and doing a real tasting.