Best way to Crossover JL Audio F110 into system


I just purchased a JL Audio sub and want to use a crossover to maximize both the sub and my Sonus Faber Olympica III's. I know that JL has a crossover for 3k, but was looking for "better and possibly more economical" way to achieve this. 

Any my feedback would be appreciated. 

Regards,

hambon
Are you unhappy with letting the SF's roll off naturally and just using the crossover that is in the F110?

If you are looking for a cheaper option than the JL crossover, look for a used Velodyne SMS-1.  They are discontinued but even new they were only $400 or so.  It will do what you're trying to do and it has a great spectrum analyzer to help dial everything in.
It's probably too late, but the better idea would have been to get a stereo pair of E110's and use the crossovers built in.  Nearly identical performance to the same sized Fathoms.
Thanks for the tip. I may look to see if there are any out there. Are there many differences in these?