You can pick awesome DVD burners at very good prices nowadays, I mean tghe one in my signature (NEC 3540A) is an excellent example. I mean here is the OEM version on Newegg:
And here is the full retail version:
Just $5 more, and for the price they do an excellent job
I can't complain about mine!!
But if you want to go all out for one, look towards the Plextor range as they are expensive but I hear they are good. In my opinion, they aren't worth the extra money as it's not a HUGE jump in performance, but here's a link to one of them for your information:
I mean for the extra $100 you're not going to be writing DVDs at any noticeable speed over the NEC, and I recommend the NEC as I have first hand experience with it, but any dual layer is very good for the price now. Just stick to known brands and you should be fine
Hope this helps!