Question on Brake Calipers

One of the last items in my modification list is to change my Calipers on my Proton S70. Honestly, I'm only changing it for the visual looks, but I don't want to compromise the vehicle safety.

I've seen multiple car owners that paint/wrap their calipers, idk its just not suits my taste. The bigger Calipers looks more appealing to me.

Now comes to my question, which brand of caliper should i change to? My budget is around 6k or so, can you guys share your experience in changing calipers?