Well, Rosemary, I wasn't planning on giving the specs yet, but since you're on the fence, and others might also, here's suggested fabric requirements. Remember that VALUE is more important than colour, These fabric requirements are SUGGESTED, as you may want to make a smaller quilt. Of course, where I say 'dark', you can do light if you wish. Just adjust all your values as necessary.
Fabric #1 background 3-5/8 yards If doing scrappy, make sure the colours and VALUES are very much the same.
Fabric #2 4 yards (dark main, including most borders and binding)
Fabric #3 2 yards (medium Main)
Fabric #4 1-5/8 yards (med-dk that is different that Main but works nicely with Main)
Fabric #5 7/8 yards Medium fabric in same family as #4
Fabric #6 1-3/8 yards - A highlight fabric
The colours chosen for #2 and #3 will be the colour your quilt 'reads'
I'm not sayin' any more until you sign up
To be honest, some of my fabrics are 'light', but that's what I could find, and I'm working 4 of the 6 colours from my stash!