Looks like you picked up some nice plants at Aquascapes. Is that an Alternanthera 'variegated' I see in the last pic? That's one of my favorites.
Nice grab on that hairgrass too, I don't think many people have that species yet.
I think it's human nature to second guess your choice for your stones. You wouldn't be the first person to feel that way. I like the stone you have though.