Futura: I got on the Smith & Wesson Model 66 bandwagon early (1972'ish) and absolutely love them.
Currently I am down to just 5 (five) Model 66's - I own them in 2", 4" and 6" barrel versions.
I carried a Model 66 for many years professionally in fact.
My enthusiasm for the Model 66's was curbed slightly when Smith & Wesson came out later with the full lug barrel Model 686's and I own several of these now in 2 1/2", 4", 6" and 8 3/8" barrel lengths.
Go to a gun range that "rents" both the Smith & Wesson Model 66's and the 686's and compare them for yourself.
I slightly prefer the "feel" and "stability" of the heavier Model 686's over the 66's.
Best of luck to you with whichever you choose.
Hold into the wind
VarmintGuy
P.S.: I personally avoid the current production S&W revolvers with the "hillary hole" in the left side of the frame - that is why your linked to revolver is pictured/shown ONLY from its "right side" - I strongly suspect there is a hillary hole on its other side and those are in much disfavor among most S&W collectors and many S&W users (me!).