Modding my M6 for more power

[Verfroren M6]

I have a 17 M6 GC Comp, exterior is just about where I want it but now I want more power! I'm familiar with turbo cars but not very familiar with the S63 engine. I'm going to build this in stages but I'll start with the simple bolt ons. Question is, i noticed there's not much turbo noises coming from the motor, but noticed turbo smart makes an electronic blow off valve, and also a wastegate. Has anyone had any experience with either one? I'll be installing catless downpipes, dinan intake and a dme tune with aquamist water/meth injection. Any input is greatly appreciated, here's my car!

[The_M6]

Most people start with intakes, downpipes, exhaust, charge coolers, and charge pipes and applicable tune, Stage 1/2 etc. With those mods, depending on the tune, you can easily get to 700hp.