The 3rd generation S&W autos have always been amongst my favorites. They have always had a good reputation as solid pistols and are quite accurate. One of my favorite features of these firearms are the generally very nice trigger pull for a traditional double action. The trigger reset is also very short and very crisp. The 5906 is the standard in my mind in the category of traditional double actions.
I either own, or have owned, the 5905 (very rare), 5906, 6906, 5903SSV (a regular CCW for me), 3913, 4006, 4013, 4506, 4513, 1006, and probably a couple of others I am forgetting. I am a fan.
Enjoy it.