I have a similar setup as yours. 2004 M3, Factory Deck, KR2, JL 300/4, 1000/1, 12W6v2
You want warm sound? At first I went from HK factory to CDT CL-E61CV. These have nice silk tweeters and are very warm. I've had nothing but bright speakers (Previous speakers: Infinity Kappa Perfects, MB...