RPM: since you're in Michigan, I'd go with LET/Eurocharged. That way you can just drive down to their shop in Chicago and get the tune adjusted whenever you need to - rather than removing your ECU and sending it off to be retuned. I love UPS and FedEx, but I really don't trust them with my $3,500 ECU. I'd rather drive a couple hours (fun in and of itself) than ship it.

qzomak: sorry dude, but I don't know of any Crossfire tuners in Canada. In fact, the only Crossfire tuners that I know of are LET/Eurocharged, InMotion, SpeedInnovations, and RENNtech. I believe that both SpeedInnovations and RENNtech priced themselves out of the Crossfire market. (Edit: that's for ECU tuning - there may be "tuner" shops that will work on your Crossfire. I'm not sure which one you mean.)