Re: questions about buying a dvd for desktop?
First up, nearly all optical drives are installed as soon as you boot windows after installation. If not, they always have a drivers disk.
Secondly, I highly recommend a burner over ROM, purely because older technology tends to become obselete before newer, and the price difference is easily justified.
And lastly, I love ASUS burners. The extra $15 is worth it when it comes with NERO for free. I've forgotten the warranty, but its very reasonable.
So good luck!