Considering your price point, I suggest finding a gently used, "pre-owned" gun.
Some of your criteria are mutually exclusive, or almost so.
I believe that the heaviest .357 Magnum revolver frames are by Ruger, but they aren't small. S&W frames are small, but they aren't heavy.
Neither S&W nor Ruger will beat the Colt's trigger action. However, judicious gunsmithing may get them close.