Help me decide dvd drive -- too many options and choices?

I need an internal dvd drive specifically for burning videos and data, but I am always indecisive when there are so many options and brands out there. It also seems like newer models with faster speeds are getting pushed out in the market every couple months. Lightscribe isn't important, but would be nice to have. Dual Layer writing is important, but I'm sure most drives have switched to this option as a standard.



My questions are..

1. Will any internal drive work for me, or will I need to find a specific size? (I have a gateway desktop with a 5.25 inch drive bay)

2. Which brand is more economical? (I've heard LiteOn, Samsung as among the leaders.. what about Memorex?)

3. If I bought a 16x dvd-r writable speed drive today, how long do you think before that becomes obsolete? I already see 18x models out, and 20x coming soon.



I might have answered all my questions, but I would appreciate any comments and suggestions to aid me toward my purchase.



Thanks you guys :)Help me decide dvd drive -- too many options and choices?
I have a LG Super Multi DVD+ReWritable (Multi Recorder) - it kicks ***, and did not cost much



i cannot remember the model numberHelp me decide dvd drive -- too many options and choices?
This Top 5 link should help