There's no need to cross your midrange that high. If you want "crisp" highs let the tweeters do their thing withough the midrange interference. 2 speakers playing the same frequencies will only cause cancelation in those frequencies. It's hard enough trying to get the left and right to play nice with each other withough cancelation. now adding the same frequencies from the mids and tweeters are just going to wreak havoc in that passband.