I am just about finished with my M19 (sort of) clones and am gathering up stuff for my next speaker project.

I am going to use 902-8a hf drivers and have one 515b that needs to be re-coned so I am going to find another and have gpa redo them to 8 ohms. I am going to use 511 horns that I have and need to pick out a XO for them. Theres are plenty of Altec 500 and 800 xo's on ebay but which pair should I look for?