Natural rock is just the best, so we bit the bullet and went and got some from North Star Landscape Supplies. The large one next to the porch weighed 155 lbs! All together, this was 380 lbs of rock - and we could probably use a few more, we had to space them a little farther apart than I'd like. We hauled it all back to the house in Cary's 1984 VW Rabbit "Margarita". She's such a good, sturdy little car.
It'll REALLY look nice once the grass grows in around it. Which means I need to get back outside and do some more raking, so we can get that seed in the ground!