2021 zforce 800   any recommendations on exhaust upgrade?

I've been watching some videos from Main Street Cycle in Mississippi.  They seem like they know what they're doing with performance.  Here is a link to their exhaust options:

https://www.mainstreetcycle.com/shopping/productlist/EXHAUSTS-4_CA128807

[2015 Z Force 800 53/Trail EPS]

Also keep in mind that with most of these aftermarket exhausts comes the need...and cost of re-tuning the EFI system. And that's either by an add-on programmer or a ECU re-flash. These are dangerously lien already.