Right now I'm running an aem short ram with a velocity stack/larger filter and a 4-1 style header into mugen twin loop. It sounds great all the way through.
when I had my lsvtec teg a couple years ago I went with a custom 3 inch intake pipe, velocity stack and large filter. For exhaust I used a tri-y 2 inch and apexi ws2. I made good power and the tone was literally the best I've ever heard.
Have fun with it, find a purpose and build towards it!