yeah this is the same exhaust i have, 3" race exhaust.
Have you had someone drive your car fast whilst you listen from the outside, they actually sound really nice and powerful rather than tinny and ricey.
There are 3 things that can really improve the sound with this exhaust. a remap instantly gives you a deeper / louder raw, and a decent intakes also seems to deepen it.
the final thing that made the most difference was getting rid of the pre-cat, not only does it free up about 5-8hp it also give it a deeper note. Those 3 things combined really changes how it sounds, so if you have or thinking about doing those mods, hold off on removing the silencer.
And finally, if you are going to buy the downpipe i would definitely not remove the silencer, it will be too loud and droney.