I would reverse the order.
 

I would reverse the placement of the borders. Ex: a 1 1/2 " deep color from the blocks for the inner border, then a 4" border of the dark cream. With the inner border of a deep color, it will make your blocks' colors to pop and the outer border of cream will tie all the colors together. Binding could be of another color from the blocks.

You are a brave person to tackle circles. I am going to try them one of these days. :o Your top is beautiful.

I was thinking maybe a dark brown. Try different widths to see what looks best to you. I would start with 4"

These are the colors that spoke to me as well. If you use cream or tan, the design will get lost. I would do the blue first (narrow) and then rust (wider by 2-3x). Then scrappy binding.

I would put a red border 2-inch border, then a tan or cream 4-inch border. I like your idea of a scrappy binding.

Excellent ideas to consider. Thank you for explaining the reasons behind the color choices...such as darker borders stop the movement and certain color combos make the colors in the blocks pop. As many of you have suggested, I will audition the fabrics and take pictures to help me choose what works best. I have run out of the batik (darker) background fabric. The only fabrics I may have enough left over to do borders with are the creme, blue and rust (depending on what width borders I pick) I can audition borders with what I have to work with first and if need be, go to the fabric store to buy more in that color family. Stay tuned!

If you have the Robert Kaufman Quilting Calculator app, you can use it to work backwards from how much fabric you have to how wide you can make your sashing. It's brilliant! Love that app!

2 questions- what color do you want this quilt to be and what size do you want it to be. color and size will help determine how many borders and what color. IMHO I would but a dark brown 1' inner border and then a tan border if I waned a brown quilt. audition several choices and then decide. The quilt will "tell " you what it needs.

I would put a small darker border to frame the quilt (stop the eye) and then you could use a larger border of the beige-ish fabric. You could use whatever size you need to make your quilt larger, but I would probably keep it no larger than the 'pie' piece. If you need it to be bigger than that, then I would consider multiple borders or a border using pie shapes laying in a line (rather than forming a pie). I hope that doesn't sound too confusing. I know what my brain is thinking but not sure it is coming across very well!

I like how it looks without a border--I agree to enlarge by adding some more blocks instead. Nice design and nice job!