You may WANT an external Blu-ray burner...but I don't recommend this to you going forward. You want to provide very healthy videostream rates between burn and test playback. If you have a native connection between the Blu-ray external side on a USB 3 line with one of the very fastest chipsets (Renesas, comes to mind) you might barely get adequate stream playback , maybe.
Recommend you connect SATA2/3 spec (internal burner design) to get your Blu-ray burner running well for burns and QA play.
I had to purchase an external writer due to the limitations of my system and purchased an LG BE14NU40 drive. I have made many Blu-ray video discs without issue at 6x on my UBS 2.0 connection.
Thanks to both of you. I use a Dell laptop with the combo optical drive (plays blu-ray disks, doesn't burn them). As it is a "slot" (not a "tray") type, there is a problem with upgrading to an internal writer. At least I couldn't find any compatible replacement. So, it seems I must decide on an external burner. I've been also considering an LG burner, but via eSata connection (LG BE12LU30), as eSata is supposed to be faster than USB 2.0 (?). My question, Bofus, do you burn from DVDA?
The drive I purchased also has eSATA and USB 3.0 connectivity (my desktop only has USB 2.0 and all expansion slots are full). I have not burnt a Blu-ray from DVDA yet (mainly because I do not like the templates Sony provides) but used the software that came with the drive and upgraded the "Power Producer" program.
I used to burn DVD's from my Power Mac (better content for making DVDs: edit on Vegas, export to AVI, etc.) but the machine is old enough (2002) that it cannot make Blu-ray discs.
As I stated previously , if you have USB 3.0 throughput on a fast chipset - you can use that type of external connection to get what you need. NOTE if you connect a USB3.0 drive to an on-board PC USB2.0 connection - your output is throttled down to an inefficient USB2.0 level.
Esata is really not faster than USB3.0 in practice. Esata is also a problematic type of connection with sporadic issues, such as dropping connections, and other anomalies -depends on the config of motherboard.