How do you figure a 300c will out run your svt around a bend? The only car out of the group that you mentioned that I would consider would be the legacy. My opinion is do the 3L swap.

Vinny 2000 T-RED CSVT MODS: 18" REV model 2 ST200 struts/Roush springs CTA intake Pipe/K&N Filter Dtec Heatshield Optimized TB True Duals w/ magnaflow mufflers/resonators