My vote goes for GP100 or SP101. If you go on youtube rugersix has a video of a full disassembly of an SP101. It shows how solid and uncomplicated the revolver is. I love my S&W but taking the side plate off and putting everything back together is a much more complicated affair. I would recommend the following:
Security or speed six etc.
Good luck with your seach.
I do not love the bright sword for it's sharpness, nor the arrow for it's swiftness, nor the warrior for his glory. I love only that which they defend.