MSP vs PR5
I'd go for the MSP over the PR5, actually I already did back in January when I bought my MSP! My wife and I checked out both cars, and although the PR5 was a great car, I liked the MSP better. The PR5 handles fine... but it doesn't handle like an MSP. Mazda played with the MSP enough to get the handling right. Sport Compact car said it was faster than a Type R -- that says a lot, considering the Type R has been the raciest FWD car since it came out here in the states (not talking drag strip times here -- sorry, not a drag queen yet!). In addition to a variety of used cars, I also drove a focus SVT, Mini S, and Mustang GT, and liked the MSP the best by far. I like the interior of the MSP, although there is nothing wrong with the PR5. In addition -- the turbo is covered under your warranty -- warranties are good things with turbos (the ghosts of multiple 2nd gen RX-7's still haunt my parents' house...)
There are a couple of minor annoyances with the MSP: namely the radio which breaks, and the windshield which also breaks. I've had great dealer support and had zero problems getting anything fixed, including after my wife ran it into the back of some old lady's lexus.

She said she forgot that some people didn't merge with the pedal to the floor

! I've been driving old cars for 12 years, so the suspension clunk never really bothered me. And with the ECU fix, I don't have any hesitation (which really annoyed me).
With the MSP you get a great car out of the box (in my opinion) and a much smaller production run, so you are always getting comments from people about the car without doing crazy stuff to it (although I like what a lot of people have done to their P5's!).
Either way you go -- it's a protege, so there are plenty of parts around to fix it after your warranty runs out! Later...