We used to play these games with DSM/EVO crowd. Fastest/Most power stock appearing turbos was a coveted title in that group.
I do have a rare concern about the s280 though, would that pass a smog check visual? Back when I used to smog cars in 2010-ish, I would fail that thing no question assuming it didn't have a E.O. # (I was generally more thorough than most techs to be honest), but things are different these days so I'm not so sure it would fail assuming you kept everything else as stock looking as possible. Has anyone passed a California smog check in the past few years with the s280 installed? If not, then my choice is clear.