Well, I went ahead and disconnected the SDA tweeters on my SDA2's. Felt like trying it out last night after I had sat down and listened to a few tracks... I was feeling more annoyed than usual by the SL2000's, so I figured, what better time to silence two of them :p
The difference is good, IMO. The high end is much less confused now. I hadn't really taken notice of it until the confusion was gone. I think they're going to stay that way.