I have the TRD Duals...
http://www.tundrasolutions.com/forum...h-sound-clips/
My opinion, if you are going to tow, go with side exit TRD duals or you will kick yourself in the azz later.
If you don't care about the noise or are not going to be towing, and don't care about keeping everthing "TRD" I think the Borla may be a better choice.
Good luck, and I don't think you can make a wrong decision between these 2.