I like your quilt ... a nice way to showcase some different blocks, in the star centres!!
While I like quilts without borders, I agree with you, that this is not one of those!
Not knowing the sizes of your blocks and sashings ... nor the strip you have laying next to it, it's hard to know how your suggested measurements compare!
So here's my suggestions .... quilt top, then a black border about 1-1/2 the width of the sashings, then a red flange, then another black border about 1-1/2 times the width of the first black border. Then bind in black.