Your quilt is breathtaking. I think either way you do it will be fine. Use whichever method is most comfortable for you.

I don't have a clue but I sure like it as is. Very striking quilt.

what an amazing amount of work! i would follow with what the ladies above have said; and i do agree that is VERY striking! its going to look fabulous!

Oh my I love it! Can't answer your ? though

I agree, boy that sure is wonderful work!

Love it. Great job. Colors are outstanding.

You have enough action going with the blocks so I would go with whole strips.

Definitely whole strips of the black -- you can line it up properly, just use lots of pins and check, check, check often. The blocks should be the focus and with the black strips, they will be.

Beautiful quilt! Whatever you decide will look great! Look forward to seeing how you finish it!

I would make smaller blocks (same way you made the larger ones - or the reverse) and use those as cornerstones....not just because you won't have the longer piece of sashing, but mainly because it would be a more interesting design overall.