I have been researching for over an hour and cannot get a straight answer. Since prices are so high for BD-R DL's not many users are using them just yet.
I have read more issues with coasters with the Verbatims, surprisingly. i am thinking of going with TDK due to reading about great compatibility in different players.
This place has amazing prices, and great reviews: http://www.play-japan.com/products/TDK-BD%252dR-DL-50GB-4x--Blu%252dray-10-Disks-Repacked.html
I am very tempted to order that, but want to hear back from the masters here first.