xkape

450 - 500 rwhp? Buy the supercharger and forget every other go fast mod because you will already be there.

Focus on suspension after that. More money can be dumped into suspension that the cost of a blower easy. Everyone seems to view suspension as kind of like replacing your washer or hot water heater. Its a great thing to have but no one really gives a F. I don't get that though. I bought everything imaginable for suspension. It is very important to me to hold the road. above all else.

wcgman

^ I would listen to xcape. I've done a roush m90 +FRPP 4.10's in a '10 and it had mild suspension bolt ons and at times it was scary. Great power and it cruised great too but if you got on it, it was sometimes a bitch. Too much for that car to safely hold the road IMO. After I sold it, the guy who bought it wrecked it a month later. He was calling me because he'd busted a wheel curbing it. That's when I got my 07 GT500. More power but it in stock form other than wheel hop it held the road better. Then we bought my wife an 07 vert with full ford racing suspension and FR supercharger. That thing corners like it's on rails. I would say if you're going to be smart about it, then first do some brake upgrades (ss lines, pads, rotors, maybe a brembo swap), then suspension and go deep because it makes a huge difference, then power and seriously consider putting 4.10's in the pumpkin. But if you're looking for immediate bang for you buck, tuner +4.10s, then supercharge, then suspension then brakes. You'll have more fun sooner but you're also running higher chances of losing control and eating the wall or worse.

I'd also skip the cam swap. It sounds cool but for the coin and effort involved, your money could be spend better elsewhere IMO.