Your target curve is close to what I use. However, I prefer to keep mid-range response flat out to 2KHz before I start high frequency roll off.
Question: Why the two different types of filters when crossing mid-range over to tweeters? The advantage of using Linkwitz-Riley is that the crossover point sums flat. You have a 12dB Butterworth crossing over to a 24dB LR. Do you see any funkiness going on in frequency response or phase in this region?
Ge0