I like QuiltE's idea of a narrow white flange (1/4"?) then more red border. I think that would be dynamite.
Also agree with most other posts ... if the quilting is going to be special (ie not an all over or just SITD) then use the solid red with white thread to show off the quilting on the back. If your just going to SITD or use an all over quilting - then I would opt for the floral print.