Best Capacitors for Crossovers


I am now in the tweaking stage of trying different caps in my crossovers for my DIY homemade 2 way. I presently have and will soon try a 5.6uf 800 vdc +/- 2% Jantzen Audio Silver Z-cap.

I see that Mundorf, V Cap get a lot of accolades, and the Dueland are quite pricey.

Does anyone have a favorite?

I am trying to cross over at about 4500HZ at 6db.

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Thanks guys! Any of you guys members at the diyaudio.com forum?

If so, what is your forum names if I may ask? Mine is FSHZ:42

I just bought the New Martin Logan 11-A speakers with dual 24 but active bass per speaker. It has one major crossover at 300 hz 
then free range  to 23k it only has 3 caps a Big 33uf Solen,for the Bass,and two smaller Poly cap. I got rid of all 3 and I tried a few combinations the Mundorf Supreme  and Clarity Csa- together 
bypassed by Mundorf Silver oil ,for Big 33uf cap Clarity Csa- which is 2x the diameter of the Solen. I can tell you for $ 300 retail 
these caps complement the stat panel very good since this crossover integrate the 2 smaller caps they complement each other 
it sounds very good space is maxed out .in its separate chamber 
the  Mundorf Silver oil .22uf caps are very good at giving a bit added 
depth and air. Image depth on these stats with this latest generation 
speaker is excellent,and with the 24 bit Active crossover ,and bass room correction seamless integration and no bass nulls in the rom area.  The other parts of the crossover was spot on Jantzen Copper inductors,and 1% resistors connected to a big metal heat sink.
having modded equipment,and speakers since 2000
no capacitor is ideal in every situation .Mundorf some may not like their sonic ,but many do ,and in my situation mixed with the Clarity
and Silver oil a very good and  cost effective Solid combination 
as good as other single caps at up to 3 x the cost. If anyone in New England-Ma area wants to hear this setup drop me a line .As a Audiophile I  Like the fellowship.