I haven't tried Virgin either but I too suffer from a bit of irritation from too much PG. I have found through trial and error that I can vape a 50/50 blend just fine but anything more and it bothers my throat. Most of the time I tend to stay with a 30/70 or 20/80 PG/VG blend though.
VG is a thicker, sweeter base and will give large vapor clouds. PG is thinner but it carries flavor better. The vapor production is lower with PG base. Most of the places I order juice from will add flavor shots if you ask them. That seems to offset the reduction in flavor of high VG liquid. Hope this helps!!