I definitely use clip-on stirrups when I want pants so sit correctly in boots. Don't know how people make them cooperate otherwise.
I have these and I love them. I've been riding once a week since November in my current pair, I just machine wash them after each ride and they show no signs of wear so far.
I have big ole calves and a 29" waist and love these https://www.amazon.com/gp/product/B0001F3INK/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
I own four pairs of breeches from this Amazon seller (including the pair linked there), and would recommend them to anyone. The fit is great, they hold up to heavy use, and the price can’t be beat.
Tuffrider schooling tights are THE COOLEST tights. silicone knee patch and less than $40 a pair. (I got mine on sale at $30/pair)
ETA: I live in south Florida and these are a lifesaver
Tuff Rider ventilated tights! THIN and has mesh but arent see through on the mesh (so long as you get the right size - if you get them too small, too tight, the mesh may be see through) AND they are under 40!!!! i would not show in these unless it was a SUPER CASUAL fun show.