So, I ordered 5 lbs of Peaberry, 5 lbs of Sumatra Mandheling, and 1 lb of Dark Sumatra Mandheling.
I think the dark will work better than the light roast, but I didn't want to get carried off. I like a light roast because the dark always tastes bitter to me. I'm super-sensitive to bitters and have to put salt in almost any coffee but my own.
I'll try the 2 blends and see how it goes.
I should have gotten some Yirgacheffe, too. Maybe mix 3 or 4 for my blend.
That'll give me something to obsess about later.