Rolling Waves

I saw this quilt, called Rolling Waves, on Facebook.... and fell in love with the movement and flow of it.  It took some work to get the pattern (none of the links worked, but I finally got in contact with the magazine it was in and someone kind and helpful in their customer service department sent me a copy of the pattern via email.  Can't be thankful enough...

I was a bit apprehensive of my color choices as there wasn't as much contrast as there was in the pattern, but went with my first choice anyway, as I fell in love with these digital prints by Jason Yenter, one of my fave fabric designers.  One is from his line called Enchanted Garden, the other from the line Diaphanous, and while I'm not generally a fan of floral fabrics, it wasn't an 'in your face' kind of floral, so I thought it would work, and I loved the colors (though I discovered later, that it came in other color waves I liked even better... ah, hindsight)... Anyway, here is the finished quilt top (sans borders):

the finished quilt center is 74'x74".  I'd like to be able to use this on my king sized bed, so it needs about 10-12" on each side in the way of borders... but just 12" of background all the way around would be boring, not to mention unpleasant to look at... and I don't want to make more blocks on two sides, as that might actually make it TOO big.  What to do???  I'm thinking maybe a 3" or so strip of background, followed by a narrow (1-2" strip of the blue, followed by a 6-7" strip of more background, mitered of course... barely better than just all background, but I'm kind of not feeling inspired by anything else just yet...

Ideas are welcome!  Thanks...