I made Queen size sampler blocks (12" finished) in 2 colors for SDD wedding and one for my sister with 4 yards each color. I would sash these with the lighter of the two fabrics tho I didn't for my sister. You would have plenty of fabric.
In my webshots link, below, #s 3,4,5 is the wedding quilt just layed out. #s 6,7 is my sister's of fabric that she just loved and couldn't bear to cut into. Each used 30 blocks from Quilter's Cache. If you would like a list of the blocks...I spent hours hunting for them....just pm me and I'd be glad to give you the info.
I have found that the smaller the pattern, the more fabric you use. What ever you decide to do, have fun with it. (^..^)