This was my thought too. The quilt is already very long and I would imagine this is for a raffle so you want mass appeal. What bed size is that now?

Ohh duh! I didn't read all the comments. Yes a tuck for the pillows would take it up.

that is a beautiful quilt yes I think it would look good with the brown and then if you want it pieced border you could do piano key with the colors in the quilt.

First of all, I'm a huge fan of double borders, the inner one more narrow and the outer one more wide. (Think of the matting around pictures.) I agree with a narrow inner border using the dark brown. For the outer border, tho, I'd stay with the "squares" motif you've got going rather than switch to another (tho piano keys wouldn't be awful). Perhaps do a checkerboard border using the red and cream tones. (Wish I had a photo for you.) Then bind the quilt with more of the brown.

I would try to add borders to the sides but not the top and bottom!

What about a dark brown narrow border, then either red or tan squares set on point (with HST's in the opposite color) and finish with another narrow dark brown border?

Wow! Beautiful quilt and the colors just make the whole quilt pop.. whatever kind of border you put on I'm sure it will look great..