I'm new and I ALWAYS* putter around and change my mind until I'm happy. For me, the fabric choice is the first thing someone will see and either enjoy looking at or not. Why go to all the toruble of doing a quilt with something which is ho-hum, or a little off, or just not good enough?
*EXCEPT ONCE ...the one time I didn't was an open class I just took where it was weekly, and you had to buy the fabric from the LQS giving the class. So I had a great pattern - Hyacinths by Clothworks but I wanted to do it in teals and peach for my sister in law, and the owner - a fabric-choosing expert - helped my pull together six colors and choose where they went. No fault to her, as she did the best with what she had, but as I started to assemble the HST and Flying Geese and put them together, my heart sunk. I showed it to the owner and she agreed one of the fabrics didn't work and she told me I could supplement that fabric from another LQS. I went right on line, grabbed matching fabric (Martinique by 3 sisters) and took apart the bad blocks, recut new fabric, snuck in a couple more complementary fabrics, and now it is much better. I've done most of the quilting and I'll give it to my sister in law for Christmas. BUT I am still not satisfied.