Myself, I prefer a 5.5" barrel, at least on Ruger single actions. Honestly, I shoot about the same with 4 5/8, 5.5, or 6.5 inch barrels, but the 5.5" length just seems to balance better for me. I feel like it's also a good compromise between sight radius, velocity, and "packability".
Also, I'd suggest that before you commit to one style or the other, you try handling both the blued, and stainless versions. The blued has a lighter alluminum alloy grip frame, and the stainless has a stainless steel grip frame. It's not a huge difference in weight, but in such a light revolver, it does make a very noticable difference in the way the gun feels in your hands.