[Manic]

It really depends on your long term goals. I've seen a lot of threads about people buying multiple exhausts, coilovers, intakes, etc etc. Most of the time, it's because they weren't really thinking about their overall build and just picking out parts that sound good to them. This is usually alright, but sometimes it can lead to issues down the road.

For instance, I'm currently set on the Perrin 2.5" resonated when I get the funds because I definitely plan on getting an aftermarket over pipe, possibly a front pipe and headers as well. Although by itself, it's pretty quiet, only minutely louder than stock, the Perrin 2.5" resonated will avoid any rasp down the line. Plus, I don't plan on ever going forced induction so no need for 3.0" piping.

If you're sure you're not planning on any other exhaust tweaks in your build, the Q300 or Perrin 2.5" non-resonated will give you that mature rumble you're looking for with a modest boost in decibels. At that point, it's you're call on which catback is more aesthetically pleasing to you as they're both great models with great reputations on these forums. Just know your long term build if you don't want to end up replacing these exhausts in the future.