Ruth, why do you want two writers together? The only thing I can think of is to do disc-to-disc duplication, but since you only want to work with DVD-RAM discs, I don't really understand.
Drive choice wise, I think all 4 drives are legitimate choices. Here is a little background on the the two LG ones and the Lite-On :
- LG GSA-H10A
This is essentially the successor to the 4167B. The main difference between the two in terms of features is that the H10A writes DVD+R DL discs at 8x whereas the 4167B writes them at only 6x. Burn quality is pretty good. Review for this drive is here :
From current tests, the H10A can be cross-flashed to a H10N (see below).
- LG GSA-H10N
Probably the successor to the H10A. LG crazily released these drives only about 3-5 months few months apart in some countries. The main features of this drive are 12x DVD-RAM and 10x DVD+R DL. Before you get all excited about the 12x DVD-RAM, note that the discs are not available anywhere except Japan right now. Nobody knows when they will arrive in other markets.
Also, there is third party firmware which will give this drive the following features :
- auto bitsetting
- UDMA4 (standard firmware is UDMA2)
- 16x DVD+/-R reading speeds (standard firmware is 10x)
- 12-14x DVD+RW reading speeds (standard firmware is 8x I think)
- 10x DVD-VIDEO SL ripping (standard firmware is 5x)
- 8x DVD-VIDEO DL ripping (standard firmware is 5x)
Note that the H10A can be crossflashed to use the same third party firmware.
No reviews for this drive yet as it is very new and few people have the thing. Plenty of scans from folks who have crossflashed their H10As into H10Ns though and oen or two genuine H10N owners :
- Lite-On SHM-165P6S
Burn quality is not really that good with this drive, but the this is the only drive that does DVD-RAM and quality scanning. Review is here :
Which drive you choose is up to you. Pros/cons :
- doesn't support bitsetting for DVD+R discs, currently no third party firmware to enable that
- if you buy the 111D, you again need third party firmware to get the DVD-RAM function, which will invalidate the warranty of the drive
- good burn quality but not that good for 16x DVD-R discs
- does do quality scans but nobody knows if the scans can be trusted yet
- good burn quality
- can be cross-flashed to H10N (but again third party firmware invalidates your warranty)
- 12x DVD-RAM
- where are the 12x DVD-RAM discs?
- can use third party firmware that adds a lot of features but again, invalidates warranty
- seems like good burn quality (from user tests so far)
- so so burn quality
- does quality scanning, a good companion to your 4163B which doesn't support this feature
So choose and decide based on what you need.
I can't answer your two questions above about drive compatibility as I've never had a Lite-On. I do know LG writers usually work well with BenQ writers connected on the same cable, but in this case that isn't an option for you. The only current BenQ drive which does DVD-RAM (DW 1670) isn't that great in terms of burn quality and doesn't do quality scans, which is sort of why most people get BenQ writers int he first place. (note : I'm deliberately leaving out the older BenQ DQ-60, which many people describe as a disaster)