I'm on a Tour, but perhaps this will apply to you, also.
I use the Bedside mode option so that while plugged in, or on my charging cradle, and between the hours of 9pm and 7am, I get phone calls only. You can set the sound profile to be any of what is available, including Silent.
This way, if I am still up, I'll get calls or messages until I go to bed and actually put the phone on the cradle to charge it while I am sleeping.
I use RingScheduler on my 9650 and I am happy with it. It changes my profile at 7:30am to my custom "At Work" profile and then back to my normal profile at 4:30pm. It has other features that are kind of cool also.