To put your mind at ease, here are the main specs on the xover.
Response: 20-20K +0/-0.5db
SNR @+4dBu 20-20K unweighted
Low out: >93dBu
Mid out: >95dBu
High out: >90dBu
Dyn range >106dBu
crosstalk>90dBu
THD+Noise <0.04% (Limiter off of course)

The XLR is a pain, but I'd recommend the Neutrik XLR's. They are pretty easy to solder to. Just cut a RCA/RCA connector and solder the shield to the - and shield pins and the center to the + pin.