What's the definition of 'best?'
Most practical and dependable would be, for me, a stainless Redhawk with 7.5" barrel.
Best-looking would be an 1860 Army, or a S&W model 3.
Speaking of which..does any company currently produce a Model 3 in anything besides .44 Russian? .38 Special would be perfect, to match the 1860 'conversion.'