For two inch exit drivers, I recommend the 500Hz, 600Hz and 800Hz versions, because high frequency compensation comes in sooner, as is appropriate for 2" drivers. The 1.0kHz, 1.2kHz and 1.6kHz crossovers are designed to work well with 1" units. Those are better for DI-matched two-ways, as you can expect 12" and 15" woofers to have similar horizontal coverage to 90x40 horns when crossover is made in this frequency range.

You may also be interested in the π Crossover Spice Analysis document. It shows Spice analysis of these crossovers and other similar units, and it shows their response curves and other useful information. I did not send this by E-Mail, but you can download it if you wish. It's a couple of megabytes, so it may take a few minutes to download.