Bits and Pieces to Finished Top

I took a one day workshop with Sheila Frampton Cooper through my local guild. She was a good instructor and everyone had a fun day using basic curved piecing techniques. I've done this type of piecing before so the technique wasn't new to me, however, she did have a couple of twists that did make her technique a little different. I generally don't use solid(ish) fabric and was feeling a bit resistant but I wanted to try something different, so I stuck to her rules for the most part. I used a lot of my own solid(ish) hand-dyes, some solid commercial fabrics and one wipe cloth fabric. I'm sure you can guess which fabric that is.

Here are the bits and pieces that I had finished by the end of the one day workshop. At this point, it would have been pretty easy to put them away like I usually do after a workshop and never finish the piece. For some reason, that didn't happen. I kept plugging away, adding pieces until they fit together in a way that felt balanced.

Here's the finished top. It measures approximately 40"w x 35"h. It's not square and it's not going to be. Now I need to figure out how to quilt it. One of my friends suggested quilting each different colored fabric with a different stitch and matching thread. That sounds extremely time consuming and I don't think I want to do that. I'm thinking something simple like vertical lines.

What do you think? How would you quilt this?