Now I'm looking at some local options for filling my beds.
http://www.smithbrosmulch.com/ appears to have the best combination of available products, cost per product and delivery cost.
This is what they carry that I'd be interested in:
Leaf Humus
Sweet Peet
Mushroom Compost
Topsoil (description says its blended with leaf humus, I assume not much)
"Sweet" Soil (description says its blended with several ingredients, including sweet peet)
I was thinking of a mix of Leaf Humus, Mushroom Compost and Topsoil. Maybe a 3:2:3 ratio. Thoughts?