Gold Standard for Spring Replacement?

I've read the various threads on lifts, and it seems that there are a lot of options that all seem to work for the many Toyota guys who post here. in the near future I will be upgrading the springs on my 2015 to make it a little stiffer for when I pull my horse trailer. I'm not interested in gaining too much lift, and even though I do a lot of off road driving with it, it is mostly in pastures and around barns and arenas pulling the trailer. I guess you could say that my favourite off road transportation is my trusty quarter horse, but the Tacoma gets us to where the trails start!

So, my question - what is the gold standard for a stiffer suspension, quality being the only consideration, and how much will it lift the truck?

Thanks!