The total cost came out to $557 installed, and from my first test drive I must say that I'm happy with the results! It is a bit loud for my taste at about 2800 RPM, but otherwise it sounds great and deep. Definitely sounds expensive.
I went with 2.5" piping, and stainless steel mufflers. The tips are 3", double-walled (thanks to those who recommended that). I got an 18" center resonator to try to cut down on the noise, and I'm glad I did. It would've definitely been too loud without it. Performance-wise, it feels good but I haven't had a chance to really punch it yet. It was rush-hour, so there was traffic.
ANYway, here are some before/after shots =)
BEFORE:
AFTER:
Tips definitely are a lot bigger in real life than they appear on internet pictures. Oh well, aggressive is good sometimes =)
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