Valspar is ok , I’ve done my bedroom in it with their top of the range Matt emulsion , I do find it chips easy when knocked though
Every wall that I’ve painted brilliant white I’ve used Dulux diamond Matt and it’s better than valspar , tough and easy to clean , it’s also easy to put on but expensive
I’ve also used Armstead trade , expensive but similar to the dulux diamond range , I only used this because dulux didn’t do a flat Diamond Matt in the dark grey I wanted , I’m happy with it and again easy to put on