I would just go with a simple 3(ish)" moulding if you are keeping the same cabinets.
Oh I just read your post again and that's what you already have. I personally wouldn't go with a big tall moulding.

I love tall crowns on cabinets, but I agree with teachertile that they might not look right with that style cabinet.

My cabinets are the same (but painted) and I have nothing but a teeny piece of cove at the top. I'm actually excited about trying to squish a piece of your crown moulding up there ;)

This post was edited by Errant on Thu, Mar 6, 14 at 23:43

I've changed my mind (how unlike me!). Go with a bigger, but simple crown. An inch, or maybe two more, would look great when the valance is gone and paint/staining finished.

Here's a pic of the nothingness I currently have at the top of mine:

I have just enough room to squish in the same moulding you have, but am considering lowering the cabinets an inch or two to put something more substantial.

This post was edited by Errant on Mon, Mar 10, 14 at 23:35

Are you painting or staining your cabinets?