First of all, thank you for considering a single exit exhaust. I've been searching for a single exit exhaust for a while, So far didn't find anything I like. Love the old style exit . The HKS Carbon/Ti Muffler is a great choice. Make sure to have a joint at the muffler so (if needed) it can be easy to service or replace.
My only concern is the ground clearance of the muffler (Please try to keep as much ground clearance as possible). It shouldn't be lower than the diff (I think). To achieve this It doesn't have to be pointing upwards a lot. Maybe tuck the muffler as high as possible and point it slightly outwards. Unless you have enough ground clearance to point it upwards too.