Response was a bit late, but good -
I recently sent an inquiry to Suring Su and I did not receive any replies for a few days. He eventually came back with a nice response.
Although I was admittedly not as specific as I could have been on my inquiry, Suring answered most of my questions pretty comprehensively. We have not yet finalized our supplier choice yet, but Quanzhou Yichun was pretty competitive in pricing, ship date and payment terms.