I thought I'd ask here before I order the parts for the crossovers.

I plan to cross my 12 x 5.25" foster midwoofer line to the `49 x 1.125" apex jr tweeter (Fs between 3 - 3.5KHz) line around 5 KHz because the drivers match each in sensitivity around there. Not quite meeting the 1/2 wavelength or 1 wavelength criteria but I don't think I have a choice for a passive crossover.

Any suggestions on this point of crossover.
Also, I thought about notching out the broad hump below 1KHz but the capacitors needed for a series notch filter at those frequencies are pretty costly. Any thoughts on this?