I some times enjoy C&D's white burley mixed with a bit of their izmir Turkish.
Glad you brought up C&D's Izmir because I think it is fantastic. Wonderful straight, or mixed in lightly with Virginias and latakia and a pinch of perique for a solid English mixture.
And then last night I tried a fairly even 50/50 mix (by volume: didn't weigh it) of C&D's Derringer (a straight Virginia) aged 10 months in the jar with the Izmir, and it transported me to Tobacco Nirvana.
Honestly, I think if you are going to blend, while there really shouldn't be any rules, to me it seems best to keep it simple and use only blending tobaccos and skip the fancy stuff that the big blenders do. Of course, that comes with the disclaimer that I absolutely love the natural taste of naked and unadulterated tobacco.
Now to get some of their burley ...