DSM for DD?

[Kranz]

Well it look like I am going to lean towards a dsm for a dd. Far as mods I was thinking cold air e16g mabey a gm mass. Cams from a 92 and up exhaust 2 3/4 or2 1/2 turbo back. And mabey 550 injectors and that is about it for mods. O the car is a tsi awd. But my driving habits are not good you could say
What I drive is a 95 mazda protege 5 speed with a 1.5t and that t doesn't stand for turbo lol and it see 5 to 6 k every day and has 262000 on it. So yea I have a led foot. But that could be it is a slow car and probley go away with a car with power lol.
Well I plan on putting in new piston and rings in the dsm do to a valve is in one piston. So does any one know of any pistons that are reasonable priced for the quality. I was looking on e bay but don't trust it lol. But has any one use NPR pistons. Are they any good?