Top pics are Leyland cypress and they are dying everywhere, just plan to take them out, you can't save them. Bottom pic is Alberta Spruce. Cut those dead limbs off cleanly at the truck and see what you have left. If its still presentable, start treating it for spider mites. Start with a horticulural oil now while its cool and then a MITICIDE on a regular basis per the directions once it warms up.
I used to be a proponent of using the Green Giant Arborvitaes, and they are a good alternative, but any kind of conifers planted in mass may eventually start having problems.
Consider using an Emerald Green Arborvitae planted about 6' apart. They grow slower and smaller and are easier controlled against pests since thye don't get so big. Other wise use a Nellei R. Stevens Holly and plan to trim them 3-4 times per year.
