Supercharge or new engine?

I am kind of at a crossroads here.. my stock 150 hp 3.8 just ain't cutting it, and someday I want to make the car go fast. I like my car, I have put a lot into it, so I don't want to just sell it and buy a GT. But it needs more power, so the way I see it I can either swap in a new engine, or supercharge the one I have. Swapping in a crate V8 would be very expensive, because you have to pay to have all the components switched, maybe would have to buy a new transmission too. Then wrestle with the DEQ explaining why the VIN says V6 but the emissions says V8. The other option, supercharging my current engine, would be cheaper, but my engine has over 105,000 daily driven miles. Would a supercharger just send it rocketing to the grave that much quicker, with the increased stress? So far the engine and tranny run fine; no clunks or oil leaks or anything. I am just really paranoid that something would go wrong. This is my only car so I have to be careful, I depend on it every day. Has anyone supercharged their V6? Would you do it again?

I don't know.. grrrrr.... maybe I'll wait and see what those updated 2009 GT's are gonna be all about..I have never owned a brand new Mustang, maybe the updated design will be enough to make me sign the dotted line?

yeah, I have been looking at packages from super six motorsports.. they have a stage 3 package for the 3.8 that includes ported upper & lower intake, new heads, and performance cam. It costs a lot, but claims to increase HP by 75 with no blower or nitrous. I am researching to see what if anything it would do to my fuel economy. This car will still be my daily driver.