V6 SC or 4.6 v8 swap?

I have the 4.0 V6 and i was looking to put more power to the pavement but the 4.0 has its limit on the 1/4 times. i was thinking about getting a super charger to keep them imports with turbos off my back but also want to go up agains the V8's. so instead of waisting up to $5,000 on super charger for the v6, would it be better spent saving up for a 4.6 and drive line swap and possably a turbo/SC?