I second the quality of the LaCie d2 external Blu-ray drive, especially if you work on a Mac.
http://www.bhphotovideo.com/c/product/602325-REG/LaCie_301856U_d2_Blu_ray_D...
I have authored over 50 Blu-ray discs with this drive since getting it in Jan and I've had no problems. I use the FW400 connection and the burn time is fast. The portability is great when I'm on the road. I've used TDK, Verbatim, and Sony discs, both BD-R and BD-RE, 25 and 50gb, and no problems across the board. Letting Encore transcode can be painfully slow, so I use Sorenson instead to get a better result in a little less time.
