Tbh that's a good deal. I've heard mostly negative feedback from CS springs, coming from people who drive lowered cars. At least those comes with struts that have adjustable valving. Keep them clean and the threads lubed (you live in CA anyways) and you'll probably be good. Cx racing is like the reputable "cheap" brand. Most negative feedback I hear on cheap coilovers (specifically raceland) come from people running clapped out miatas with the coils at lowest setting (usually collar removed) and max stiff valving.. or the collars seize (not cleaned/lubed and in the salt belt).. cheap car product attract cheap buyers who often have janky setups already lol..
I've only owned bc racing so I don't know about cx first hand. But I heard good things. If you are bottoming out with coilovers it's a height/valving setting. They also have for like $100 more camber plate versions
Like I said, whether you bottom out or not depends on how you set the height and dampening. I don't know if the official BC racing site will have a sale, but vendors doing business with them usually do.