Cool works fine because of the color scheme, but I wouldn't shy away from warm as LED warm aren't "that" warm to begin with.
I use frosted for everything I can. You can get the cheaper ones for the backbox though so you don't blow it out and make it super bright...or only use 1/2 - 2/3 of the sockets.
Unless you have problems with your vision, LED strips aren't needed IMO.