I was talking to a guy that did an install on my aircraft awhile back.  I have another install in a different aircraft coming up.  He was recommending using the Fast Stack instead of having him wire up some stuff.  He said that he thought the initial cost would be about the same, once you consider the hours of trouble shooting that could occur on a wired up system.  Plus, it looks like the Fast Stack will make future upgrades a very quick job.  Let me know how it turns out.