I found them! I bought them!
After over a month of debating over 'the perfect' nude strappy sandal, I finally decided on these Zara buckle heels, almost immediately when I saw them. They are the perfect heel height--not too high, but high enough to make your legs look good--and possess a thick ankle strap (my fave!) and a skinny strap across the toes. The clincher was the price as they were a solid $40 cheaper than most styles I saw. They also come in black & red.
I'm wearing them today and love them so much! They are fine to walk in and definitely true to size (I ordered a 41, which is a US 10, as per the box) and I know I'm going to get my money's worth. Now, to find the perfect black pair (at a reasonable price).