I have Tanabe RM and compliments on sound from everyone. Everyone wit the RM cat-back i kno sounds good also. Everyone talks about N1 sounding good but every N1 i heard sounded ****y, but i haven't heard it on enough cars yet so thats just my opinion. I had Fireball for 1 day, not very loud but looks better than RM but is a smaller muffler too. Just my point of view. Its up to you, im sure everyone has different tastes.