Search for a Belkin Pure AV PF60 on the auction site. They can be found for around $100.
This unit is built like a tank, and will allow you to power on/off your whole system in sequence since it has time delay variability. You can set the unit to turn everything on when you power up the preamp, and have your power amp turn on last to prevent any thumps.
http://www.laaudiofile.com/belkinpf60.html