In regards to your SATDOM sugestion. That is actually what I wanted to do.
With my test hardware I was using a whitebox and has power cables available to power the Innodisk SATADOM.

When production systems arrived and I've noticed this with all the major server vendors is there isn't any spare power leads lying around to power the SATADOM.
The Innodisk SATADOM uses a molex splitter to go to it's 5v 2pin connector. There simply isn't anywhere to plug the power connector in most of the time.
Not without making some custom cable to power to take the power source from somewhere else.

I have used Innodisk SATADOM's in the past and found them to perform well and be very reliable.