I don't recognize PHL1230. Is this Phillips or what? One very important caution: ALL the drivers you have suggested have extremely nasty resonance peaks in their upper range, which is going to require you to use very high-order crossover networks to remove, which is a real can of worms. Having done this for a long time, I can tell you that without access to thousands of dollars of measurement equipment, you will be FAR better off choosing a midbass which is relatively flat through its upper range. This means no Kevlar, no carbon, and definitely no metal cones. Just my 2c, obviously others will disagree. Re the Ravens, haven't tried them but they probably work well IF you can get them to integrate with the cone drivers, not an easy task. You have the additional problem that they are much taller than typical tweeters and in an MTM they will cause problems due to the wide separation of the two midbass drivers. Again, if you want to have some chance of getting good sound, best to stick to good-quality soft dome tweeters since they are the easiest to work with.
