I have owned a couple of these over the years, and shot them extensively. They are fantastic revolvers if you don't mind lugging a big chunk of iron around.
The Redhawk begs for a good SA trigger; any 'smith worth his salt can take the creep out. As noted above, the DA trigger is usually fine and will only get smoother with use. An overtravel stop also works wonders for your ability to hit offhand with these guns. This can be acomplished by drilling through the assembly-stud port in the trigger guard, and tapping it for a set screw. Some folks insist on being able to adjust these from the outside, but considering the recoil that these guns generate with "Redhawk Only" loads, I took a different route.
I used opposing set screws. This requires disassembling the gun several times while you are adjusting it; but once set, you Locktite both screws and it stays put. It is well worth the trouble. Ruger's proprietary stainless is hell on cutting tools; I wouldn't attempt this myself on a stainless gun.
The best rubber grip I found for heavy loads was the Butler Creek grip, marketed by Michaels of Oregon.
Congratulations on a fine sixgun.