Your kit compents are all fine & they all sound very good stock. Even though I like to experiment with upgraded caps and coils myself, I wouldn't want any boutique parts in the kits because they all cost so much and everyone has different preferences. Whether someone likes Mundorf, Auricaps, Jupiters, or some other flavor is a matter of each system, room, and personal taste. If you put these boutique parts in the kits to start off with, the prices would go sky high and they still wouldn't be the first choice for everyone. Experimenting with all of these is part of fun for DIY personalities.