IC and Dump Valve... with a charger... first ive heard... id have thought using an IC would create far too much lag for a charger setup!?
The dump valve stuff is ****** -- superchargers don't need -- and rarely use -- a dump valve (and a supercharger designed for a 1.4 used on a 1.6 certainly wouldn't). The intercooler, you want. The Bini Cooper S used a intercooler, as do the Jags.
You won't get a lot from using the Eaton 45 (even the Works Cooper S with a bigger charger puts out less than 200bhp), and you'll still need an aftermarket ECU...............
The Rotrex is nice, but costs more than a Coupe Turbo, and that's before fitting.