DW 15
I have an old DW 15-2 I found in a pawnshop; and it has been a great revolver, wicked accurate with a 6" or 8" barrel and easy to maintain. It is my favorite handgun.
Weight wise, a 6" half lug non-vented barrel with pachmayr grips weighs less than my 4" S&W model 28 to me. The cylinder seems to be the same size as a model 19, and uses the same speed loaders. The frame is smaller than an N-frame, but larger than a model 19. I guess it is roughly L-frame size.
The front cylinder release is strange, but it works well for me. I can open the cylinder while holding the gun in the left hand while the right hand gets a speed loader.
Once I figured out how to drill a square hole in a block of wood, the shy is the limit on the variety of grips you can make for a DW. There always seem to be lots of grips, parts, and barrels for sale on ebay too.