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?

Thanks for all the help, Wayne.

Last week, I used foobar 2000's DSP filter plugin to test various filter types / x-over points and slopes . There didn't seem to be much difference (if any) between a 4KHz and 5 KHz point, so I picked 5KHz as the higher x-over point allows the tweeters to play louder with less distortion.

I've ordered parts for a 5KHz / 3rd order filter and a zobel ciruit for the open baffle woofer array . Rather than use a passive filter to tame the mid-bass / mid-range hump, I plan to use the eq. in foobar 2000 for this purpose, if I eventually find it an issue. The tweeter impedance peak is fairly benign (2 ohm above the nominal 6 ohms).

Almost there.

I electronically crossed my system (http://pub48.bravenet.com/photocenter/album.php?img=115732&usernum=4095425731)
and purchased a 2/3 octave crossover to tame certain aspects. I took it out of the circuit since its just not needed.

Marlboro

I'm satisfied with the result. Thanks, all.