A V4 will work great for you guys. You sure could use the help keeping the air cool that is getting into the engine. Not like here in BC, cold air is usually not a problem.
Seriously though, unless you guys have all the bugs worked out and your car running to its full potential (or very close) you should hold off on spending any $$ on the IC.
I only upgraded to the V4 because my stocker was leaking, but even then, I was running low 12's on the stock turbo, injectors, IC and Nitto's before I did it. Tune 'er up, and let 'er fly!