I've used the Pillar X-TRA 1420 spokes on a few wheelbuilds. Weight is very similar to CX-Ray and aerolite. Haven't broken one (nor have I broken any other spoke) so I guess their strength is at least on-par. Much cheaper than CX-Ray and aerolite, a few builders I've spoken to say it's pretty much the same spoke.
I write the weightweenies blog, hope you like it My SwiftCarbon UltravoxMy Velocite Selene
Disclosure: I'm sponsored by Velocite, but I do give my honest opinion about them (I'm endorsed to race their bikes, not say nice things about them)