looks good enough to me..you shou8ld see the crossovers I have for my components, tune it low and play with the settings to see how it sounds best but Im sure you were going to do that anyway =)
They are extremely expensive if you want to get anything 100 hz and under. It's much more cost effective to go electronic. Unless you get a really cheap inductor.
Check out parts express . They sell iron core inductors 10mH for about $15. That will get a 4 ohm woofer down to about 65 Hz. They also sell air cores for $25. They have 15mH coils as well.
Thanks! That pretty much verifies my comments! 25-50 for a 1st order crossover is a little pricey when you can pay a little more and get a higher order crossover and in most cases a configurable design.