First off let me say that I work on Toshiba Laptops for a living.
From what I have seen the Panasonic (Matishuta) laptop drives are the most popular for manufactures to use.
Occasionally I see some NEC drives and I have heard good things about them. That said, Whenever I test drives at work, so long as the panasonic drive is not broken it works very well.
In my Satellite A205-S4577 (one of their newest models) I have a Panasonic UJ-850 which AFAIK is the latest drive from Panasonic. I don’t do much burning on it, but what I have done hase come out good.
Your best luck for a good price is an ebay store. Most stores that sell laptop drives overcharge like crazy just because they can.
Lastly, what drive do you have currently? Let me know and I will give you a list of DVD Burners with compatible bezel mountings.