I was there Saturday night, but I didn't see your tank, since it was about 3am when I was in there. I'm surprised I didn't wake you up, since I kinda went grocery shopping in the pantry. Post a picture of your tank in the rate my tank forum, I'm sure some other people would like to see it too now that it's filled.
A good place to go for rocks is Hidden Creek, down behind that ministorage at Jeff and Blake Bottom. That's where I got all those other rocks from. Good source of interesting rocks, I just dunked them in a bucket of 10% bleach for 24 hours then rinsed them really well and let them soak.
I probably won't be back by there for a while, but the next time I do I might get that tank, and also my big rock (you can have the small ones if you want) and I'll probably swing by the creek and pick out some new nice rocks. If I get a lot of good ones, I'll drop some off for you