I did the window screen just like you did several years ago. I was able to find black metal screen so it blends in a little better.
Just like you I spent a day cleaning the radiator/coolers and AC. After that fun filled day I said no more and installed a screen. They only thing I can tell you is it works for me, I hardly ever pull anything and most of my driving is interstate at full speed limit.
I have noticed if the cottonwood trees are blooming it is advisable to check the screen once in a while (oil change intervals is a good time) as it will build a cotton matte on the screen. If the bugs are really heavy it will get nasty, just take a garden hose and wash it off, way easier than extensive coil cleaning.
AC blows cold, temps are very stable and no issues for me.
Brian