If I buy the disk version will I need to insert the disk every time I play?

Also, will it be possible to register the serial with Origin, like you can with games on Steam?

will I need to insert the disk every time I play?

No, the discs are for installation only.

lso, will it be possible to register the serial with Origin, like you can with games on Steam?

That is exactly what happens when you install the game via disc, since it is installed via Origin.

Also, some internet connections are faster to download than to install and swap 4 discs.

Is it really four discs if you buy the physical PC version?

Yes, 4 DVD9s.

4 dvd's for 20gb?

My English install is 24.5 Gig. And we have 2 other full VO languages on the discs.

I really wish we could just download one version. I bet it would cut that down quite a bit. (of the VO I mean)

Unless I am misunderstanding you, you are only downloading one version and that is the size of English install/download.