I'm considering dual exhaust on my 99 SE V6 Contour. The Yodude SVT Exhaust sounds like a deal and I'm looking for hp gains but some say it's loud and others say it's not that loud. Any other opinions on the system and which muffler is the quietest(Flowmaster, Magnaflow or Dynomax)

99 Black SE Sport V6 ATX
K&N Filter
BAT 21mm rear stabilizer bar
Planning Dual exhaust, possibly Yodude Performance.