2012 TE with 164K miles, original shocks & springs.

Past due, but I'm planning to have new Bilstein 4600 shocks installed at a local shop that I have been dealing with for about 20 years. I am never going to lift, so the 4600s are fine. Original shocks aren't that bad riding, actually, only notice occasionally.

Shop says they plan to replace the shock mounts too, after this many miles, and may need to replace something else, anti-sway bar maybe? Doesn't matter.

In an old post I recall someone saying they always replace the springs when they do the shocks? Can't find it, my search skills aren't good enough.

Opinions on replacing springs? Fore and aft? OEM/other OEM-like brand?

What if I want to install/have installed a front hitch (Curt), slightly stiffer springs? Does that make a difference on this decision? Is there a spec for spring "stiffness"? Suggestions welcome.

I plan to keep this until 300K miles or more, it suits me.

TIA