I LOVE my Special Edition Keurig w/ 3 cup sizes. My husband thought I was crazy when I bought it, but he soon changed his mind when he did the math. He makes his favorite & I make mine and we don't stop at Sheetz every morning.
I have found several Espresso K-cups at bigcatcoffees.com. They have the cheapest price too, around $0.54/k-cup. And I think there is a latte k-cup too. Big Cat has a referral program and free shipping on orders over $75 and a make your own sampler pack.
One other thing, we have found that we can make a 16 oz travel mug from a single k-cup.