Hypothetically speaking let's say you have a spare 15k lying around and you wanted to upgrade your ride (presumably a Mazda 3) to something a lot quicker.
Would you go out and either:
1) Sell your Mazda 3 and upgrade to one of the two:
A) An Evo IX
B) Mazdaspeed 3 (first gen)
or
2) Would you rather swap in a full Speed6 drivetrain into your 3?