I know friends of mine prefer external burners because they all use Laptops and say it prevents errors due to heat.
I actually have one computer just for burning that also doubles for a backup. It currently has a bad mother board but will be up soon.
External drives are "really" for those who don't want to mess with the innards of a computer and/or for back up.
I hate for you to buy a $160 item that you find inconvenient.
Lets say you change your mind and want an internal drive instead. No problem. They are people here at BC so smart, I re-read my posts and use spell checker three times before I post a reply. I may be wrong but my spelling will be right.
Here's the really cool thing, you will not find a group more friendly to deal with then these guys.
So we will help you step by step in anyway you go.
Let us know,
Your Hardware Guide.