I've delt with liteon, sony, pioneer and LG.
I had problems in the start with the Liteon, however, my computer just chucked a wobbly at the time when the motherboard fried, but after that ordeal. The Liteon worked fine, equal to the pioneer and sony. However, the LG DVD dual-layer RAM +/- you name it is the best by far in quality and speed. Though costs slightly more. When it comes down to it, your prety right regardless of the brand you go with (even a $50 from eBay (maddog) brand works fine) but it all comes down to the warrenty, LG just replaces no question (they did with our DVD player), Liteon's not the best, but their firmware upgrade increased the drives speed a whopping 15% for us. I beleave pioneer and sony also have good warrenties (never delt with them before), but if the el'cheapo "maddog" brand from eBay were to hack it, I doubt theres little hope in getting it fixed.
But anyways, goodluck on your purchase. AS for bluray and the rest, you could wait for it to appear, but I beleave these new technologies will scrue the whole system something shocking, it'll be all out war between the 3 or so new replacements of DVDs, all being uncompatible with each other. Interesting to see which one will reign over all in the end.