I've tried Hogue's, Uncle Mike's (combat and boot grips), and magna's with Tyler T-grip on my 640-1. Just picked up a set of Pachmayr Compac Pros. They are by far the best grips (feel good in my hand). I was very surprised by them. Second is the magnas with Tyler T-grip. A lot will depend on your hand size as well. Traush grips (France) makes a very nice grip for the Ruger SP101. He once hinted to me that he may make a grip for the S&W J frame. If he made a grip similar to the one he makes for the SP101 and dropped the finger grooves, it would be an excellent grip. Still hoping to see it in production!

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otis