I like the quilt you're planning to make. I would just put things together and see if I really love them. The shop may have a place where you can do this...perhaps an unused class room. Just sort of audition them. If you like them all together, you have it! I find when I get what I want for a quilt, I lay it out on the counter where I can look at it a bit every time I pass by. If I don't like something, I put that piece back into my stash & choose something I like better. Good luck!