Here is my advice if you are considering:
1. I got my Borla on the cheap about half price (thanks yob_yeknom!) - check ebay and the For Sale forum. The Borla is stainless and really should pretty much last forever, but the downside is a brand spankin' new one will set you back almost $500. I have seen two of them on ebay but missed out on both as I couldn't pull the trigger quick enough (my company blocks access to ebay from work - wonder why?) Mine was a bit tarnished - yob had it on his truck for about 15K miles - but stainless shines up pretty easy with sone very fine rubbing compound (I reccomend 3M) and a polishing bit on a Dremel.
2. Install - removing the stock muffler was a bit of a pain - see the start of this post. The fact it was cold and wet on my garage floor and that I have a bad cold did not help.
Expect that your cat / muffler bolts will be rusted solid. I lucked out and the left side came right off. Angle grinder with a good blade cut right through it. Wear gloves (Mechanix my choice) and a face sheild when grinding - nothing like cutting metal to make you feel like a man - safety glasses - lots of mud / salt / dirt under my truck.
The muffler brackets (2 on muffler) 2 on tail pipe are a another serious pain. I was not saving my old muffler so I cut them on the bottom. I tried to work them off, with a screw driver and WD40, but it was cold and the rubber is not real pliable and my patience was short.
I also cut the pipe in half (angle grinder again) just after the muffler which made removal a lot easier.
Removing the old muffler took almost 1 hour - I screwed around with the cat bolts for a bit and the hangers as well. Borla went right on - uses stock hangers - comes in two pieces super easy to mount.
3. Sound - it is not exactly stock - not as loud as I thought, but defiantely nice and low and rumbling.
I tried to make a sound recording with my Ipaq - not what I wanted - I'll try again tomorrow and email it to whoever wants to hear it.
Am I happy - well lets just say it was 7 degrees today and yesterday and I am driving around with my windows down and running all sorts of errands for my wife.
Jeff
