Ok... I'm gonna have to put my 2 cents in on this one.
I agree with the fact that the BORLA Axle-back Bolt on exhaust is a bit pricey, but I did purchase this part. I went back and forth between getting the muffler and piping and taking it to a muffler shop, but here are the reasons why I decided to spend the extra money...
1.) Even at a reputable muffler shop, It is still just a muffler shop. BORLA has been making RACE WINNING mufflers for decades. I trust them.
2.) IMO - The sound quality of my BORLA exhaust compared to that of a "custom" exhaust is drastically different. I went on a cruise meet here recently with some guys from 6gc.net and most of them have "custom" exhausts. Compared,... mine sounds WAY better.
3.) Ease of installation. I took the stock muffler off and installed the BORLA exhaust in about half an hour. It is EXTREMELY easy!.
4.) Name Brand. I could have gotten an HKS, GREDDY, MAGNAFLOW or any other name brand muffler and had it put on my car, but BORLA made this muffler specifically for my car... and thats why I got it.
Now, ultimately the decision is yours, but I feel like I made the right decision by spending a little extra coin.