I've looked at the two blocks, it sounds very exciting! My first thought is that the print might look weak surrounded by solids, especially with a cream background. How much of the print do you have? Would you consider using the print as the background?
I have kitted up a quilt that was built around a fabric line, but the fat quarters weren't enough, so I chose a bunch of solids so I'd have enough fabric. This echos Synnove's suggestion of bringing in some fabrics that aren't solids, so there isn't such a stark contrast between the prints and the solids. Or, if you haven't bought the solids yet, choose some 'nearly solids' like grunge (there are tons of such nearly solids out there now).
Finally, I would echo WesterWilson's suggestion of not matching your print shades exactly, but aiming to harmonize with shades that vary slightly. This will give your quilt more depth. Can't wait to see how this develops!