I have the SPA kit on my car right now. I ordered it through C-F-M back when they were selling it. I like it, but I haven't had anything else either. I'm tuning with Tom currently and I really like what it's doing. I really did spend a lot piecing this kit together though, after buying the injectors, intercooler, tuning, etc. The shop that installed my turbo back in 2009 (and did a sh**ty job) blew one turbo and had to get another from SPA. That was the only problem though, and that could have been because they installed it wrong.
For the price I ended up paying, I could have probably gotten a better kit through Tom. Just sayin..
On a side note: I have an intercooler in my garage with the inlet and outlet on the same side if you want it on the cheap.