Adam, the best shelf rock I've seen is from Gary @ Aquadome. You just have to catch it when he gets it in. I think it'usually uncured but mine had tons of feather dusters, some zooanthids, encrusting gorgonians etc - his prices are decent if you buy in bulk.

I ordered tonga branch from Liveaquaria 2 years ago and it was pretty sad - basically like base rock. I could be wrong but I believe Vinh ordered from TMC at one point in the past.