Help w/dvd burner purchase

I have been messing with this Emprex(BTC DVDRW 1004IM) long enough. Not having much success. Maybe because i am a newbee/maybe not.
I have read in these fourms about lots of problems with this unit and have this weekend as a window to take it back. So what I am looking for again is advice from the dvd burning experts.
What is the BEST dvd burner to buy and which is the best as far as quality-price ratio.
Thanks for your help in making a wise decision