I have the same setup as TallPaul--a 5 1/2" Redhawk and a 4" M29.
The Redhawk is a much better double action gun, at least for me. It's heavier and the double action seems smoother and is helped by having a narrower, smooth trigger. The grips are like smooth Magnas and work better than anything else I've tried on that gun, including Hogue and Pachmayers. It has interchangeable front sight inserts, so if you don't like the red ramp, you can put in something else. It is a very strong gun, with a locking crane, like the old Triple Lock Smiths. Stainless finish allows the vinegar/hydrogen peroxide soak method of bore cleaning. With 900 fps loads, it is almost like shooting a .38. Not quite, but almost. The Redhawk is a stronger gun and, if you reload, provides 'slightly' more margin of safety against overloads.
The M29 is, first and foremost, a beautiful gun. It is noticeably lighter than the Redhawk and would be OK in a hip holster. The Redhawk might be too much for me on my belt. Either gun handles my 'hot' 44 load with ease but the recoil is less noticeable in the Redhawk.
I'm lucky that I have both and don't have to choose between them. It would be a tough choice but you really can't go wrong with either one.