In your subject line you say: Selecting DVD internal burner, but in your question you ask about Blu-ray Burners.
For the best internal DVD burner, you must go with: Plextor PX-850SA
And for the best internal Blu-ray burner, I am forced to recommend the Plextor PX-B940SA
The PX-B940SA cost me $257.00 delivered from Provident.com and it's rated at 12X.
To see some reviews and how much it might cost you, in google type in:
Plextor PX-B940SA 12X Blu-ray Burner
Hit enter and read on.