Nice car, and welcome to HAN After driving a Ferrari 360 Spyder and a Viper last night, I'm firmly resolved to save up my money for something more tossable than a Honda Accord and am trying not to buy the Magnaflow exhaust I really really wanna get

Far more trouble than it's worth IMO to swap in a 6 speed, especially since you can't do any of the work itself. It would run around $5000-$7500 including labor, less if you also swapped in a 260 hp CL Type-S engine.