Either way. Depends what direction you want to go with the car. I like the look of pipes out the back personally, but the side pipes with SVO skirts look really good too. Here are my Flowmaster SS pipes.
http://memimage.cardomain.com/member_images/4/web/472000-472999/472790_7_full.jpg
http://memimage.cardomain.com/member_images/4/web/472000-472999/472790_2_full.jpg