I would suggest you do some reading before deciding on a DVD writer. The best one for you will depend on a few factors:
- Types of media you will be using with it, +R/-R/RW/DL,etc
- Wether you prefer best burn quality or faster burn speed
- The ability to scan (useful for a few reasons)
- Read capabilities
As you are based in India, this thread maybe of interest to you:
Also, it maybe worthwhile to PM Bhairav and ask him to post his reccomendations in this thread as he is from Mumbia.
The best drive for you will primarily be dependant on what media you can use with it and India seems to have lesser availability of the media generally preferred by users in S.E Asia/EU/NA.