If you use Bass Blockers or a cross over etc for the system, you "should" have no problem with a quality pair of tweeters... or any of the speakers for that matter. That's my next step is installing the second amp and the cross over, so I can have the right speakers performing in the range they should perform at their best, and adequate power for good clean sound, and tight crisp bass response... at least that's the "plan" Lol...
Sounds like you have quite the stable! That's great! I'll have more at some point...