I have done this one simple quilt using the snowball block and this other one I don't remeber what it's called (churn dash?) that I thought was a good showcase for fussy cut flowers.
http://www.quiltingboard.com/picture...lt-t69514.html
And there was a mystery started last year by a member on this board that was also great to showcase a beautiful floral
http://www.quiltingboard.com/picture...d-t114058.html
you can always make less pieced blocks and add more of the floral fabric in an X fashion or any other arrangements you like. If you are interested in this pattern, do a seach for "Mysi Mystery" on the board, yardage requirments and clues (5 total I believe) will come up, and also a link to her blog where clues are also posted.
Hope this gives you ideas and I'd love to see what you come up with. I love Fall fabrics and large florals.