I built my own before I heard of pure freedom. It's nice to know exactly how everything works, but it did take a few days to install, and I lost earnings on those days. I honestly think you'll be spending very little extra if you get one off Andrew (His number is above) when you take this into account.
With all the talk of safety in crash situations, Andrew is one of the only suppliers outside Ionics that fits a tank cage as standard to such high specifications. It looks very impressive to the custies,... and in a side by side crash test between one of Andrews systems and an Ionics one, I would genuinely expect Andrews to fare just as well, if not better.