Man you people LOVE to thread crap. Either answer his question, or stay quiet. I'm sure the OP has already weighed the option to use a HDD. Maybe he wants to author his own BD movies. There's plenty of legitimate reasons to buy a BD burner.
For burners, you want to go with the burner with the best burn scans. Most reviewers ignore this and so in my opinion they lose credibility.
Based on the reviews I read here, with tons of burn graphs, I chose the Lite-On iHBS112.http://homepage2.nifty.com/yss/bdr206/bdr206_top.htmhttp://homepage2.nifty.com/yss/bdr20...r206p2_top.htm
The S05J is basically like the BDR-205. The LiteOn iHBS212 is going to have similar write performance as the 112, since they use the same chipset. You are mostly paying for the LightScribe support.
I cannot recommend the BDR-206 at all, its results were really bad. The BDR-205 is good, but was discontinued so it's quite hard to find new. I dislike LG drives because they put in RipLock, which artificially limits read speed of copy protected discs. Yeah you can patch the firmware, but other brands you don't even have to. Lite-On drives have the added benefit of actually being able to run a burn graph scan.
I second the suggestion with DL/50GB discs for eBay from Japan. My spindles were about $4.60 for a double, half that for single layer. Look for either Mitsubishi/Verbatim or Panasonic and avoid the LTH. No drive can burn as well with those discs (they burn substantially worse), and they aren't worth the small savings they provide. Buy in multiples of 10 because then they seem to use cakeboxes, instead of just stuffing them in sleeves. I've heard claims that when they are shipped in sleeves, they don't necessarily hold up as well and subsequently don't burn as well as an identical disc that was shippped differently (in spindles).
Booktype setting is not really needed for BD media. It became helpful with written DVD blanks because the write specifications came much later than the original DVD spec, in particular of the '+' spec, so a lot of the older players couldn't read them without changing it.
(Re)writable BD media on the other hand came out at the same time as the BD read-only spec, so you don't have to worry about it really.
Some players did or still do choke on the LTH media as do some burners. But when you consider LTH was a hackish way to get existing DVD fab plants to manufacturer BD discs without doing a complete overhaul, and they don't burn as well in general, that's not so bad.