I guess it depends on where you live. I have never had caliper issues. However, each and every service I blow out my rotors, calipers and use brake kleen to clean the piston boots ect. I have found that our rear rotors do not vent well at all which is a leading contributor to rear rotor warpage. Not only that, but the rear rotors also collect a ton of dirt in the veins. This again is from their inability to vent properly. So, during each service, I use my compressor to blow out the rear rotors. I took the front dust shields off some time ago, and my front brake temps have come down because of this.
I personally use slotted rotors made by Power Slot, which is now owned by Centric. I only use Hawk HPS brake pads. Dimpled and slotted rotors could potentially reduce friction surface thus potentially reducing braking performance under hard conditions, i.e. fast driving, fast off road driving, and towing. For normal use, you might not notice a difference. I have heard alot about these ebc pads, but have no real world experience with them, so I cant comment. But, I can say, I have been using the brake combo I mentioned for well over twenty years and swear by it. Its on my SRT8 Charger, My Ford pre-runner off road truck and of course on my T4. Just my .02. When I sell brake jobs to my customers, I give them all options. Not everyone needs something as solid and consistent as the package I run. I sell only what each individual customer needs based on his or her needs.