Get rid of the suitcase! With it, you don't have "straight pipes". Suggest looking at AWE track edition axleback. It gets rid of the suitcase! $900. If you want loud.....that is the one.
I would have suggested their catback system with the performance link pipes. But they don't make the PLPs anymore. In fact, if you look on their website the axleback is louder than the catback. If you want a good video on AWE's track edition, see the link. You can watch the entire video, but if you want to hear how it sounds go to 9.19 of the video and that will give you a very good representation of the exhaust. You will not be disappointed! She is giving a good comparison between the track edition catback with the PLPs and then without them. But unfortunately AWE doesn't make the PLPs anymore. They sold all of their stock to the RPM store, but they don't have anymore either. The PLPs get rid of the secondary cats. If you know of a good exhaust shop, they might be able to make them for you, if you really want them.