Exhaust upgrade for riding style??

[Skypilot_imp]

Hello to the forum and thanks to all the warm welcomes. I guess this will be my first legitimate post. So anybody who has read my intro post has seen that I ride about 90% of the time in town and about 10% on the highway. So of course I am already looking at possible changes to suit my riding style. The first thing that I have started looking around for is exhaust including
Yoshimura RS3 slip on $360
Arrow slip on $540
Stayintune slip on $800
Delkevic 8 inch slip on. $225

Delkevic full system $340
Yoshimura RSCV full system $1200

The question being will an aftermarket exhaust help with in town riding performance vs stock. Much of what I’ve read so far indicates no need to adjust the AFR.
Looks like most exhaust on Samurider are crazy $$$$.