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.

ozzy
Most definitely in the mids. A must! Decent film caps is all that is needed on the bass. Resistors are every bit as important. If you have sand cast, then get Mills MRA series.
Caps in the shunt position do matter. I have heard the difference numerous times. 
Don't forget Jupiter VT caps as they are great sounding and far more affordable. I used them in my last project. 
Thanks grannyring for your advice! Can you suggest where I may be able to purchase the Jupiter VT caps at a decent price? BTW, does this forum allow you to send PM's here?
You can buy directly from Chris at the Jupiter website and he is a great guy. Here is the link. He is very helpful and answers the phone. 

http://jupitercondenser.com

You can can also buy them at Sonic Craft. They usually offer 20% off and ship quickly. Here is a link to the VT caps. The HT caps are also very special.

http://www.soniccraft.com/index.php/jupiter-vt-c-301_38_446