I have been looking for the Caschuin XA... heard it is great.Some great ones up there. Highly recommend trying Cascahuin Extra Anejo and Lalo if you haven't already.
Im going to go try to find it. I am a huge, huge Casch fan. I would say overall, it is my second favorite basic blanco behind G4 -- the Tahona.Must try the Casch XA... I tried it when visiting Dallas, TX, and haven't looked back. They don't sell it in VA (where I live), so I get my sister to ship me bottles when she can find them.
I also had Lalo in TX.. Great stuff.