Let's also not forget the easy "upgrade" feature of the UTEC. You buy a unichip with your "current setup." You add something new, you have to go and get it re-tuned or send it back. With the UTEC, you call em up (if you don't know what to do, like me!) and have em email you the new files, load it up, and you're on your way!
Also, would I be flamed for mentioning the following:
http://www.wrxhackers.com
Just starting out, but they have some good stuff thus far!