I've never been a fan of solids AT ALL. I've seen many beautiful quilts ruined using solids instead of blenders. Next to a beautiful print solids look cheap and nasty. My opinion but that's my eye.
I've got a phenomenal stash and can't really justify buying more fabric, but I do. Just now I have such an awesum collection of prints I actually don't mind spending on blenders or tone on tones. I use so much of them across many quilts, so hunt them out at sales. I also do a lot of applique so I can use them for backgrounds and the applique pieces. For now just concentrate at finding good colours at sales and buy up. Most prints will be one quilt. Blenders will be in every quilt