I would not join the Sith but if you meant Sith as a general term for Empire, then yes, I would definately join the Empire.
I think the Jedi Order, Sith, The Republic, and The Empire should be looked at as separate entities. The Empire is not evil, the Sith are. The Republic is not good, the Jedi are. I have an Inquisitor, a Consular, a Trooper, and an Imperial Agent. At first glance at the Empire, I though of them as like in the movies, killing rebals and putting a tight leash around its citizens. After playing the Imperial Agent, I have a new point of view, a lighter and broader perspective on the Empire.
From experiencing the Empire from the Imperial Agent perspective, non-force users are all the same, be it Empire or Republic.
Would I become a loyal patriot of the Empire? Definately! Would I join the Sith, no.