Could anyone give me some advice please as I am a beginner in this field?

I want to buy a DVD Writer in order to burn video footages that I take with my MiniDV camcorder SONY DCR-HC19E.

As my main goal is to watch these videos on my Home Cinema System SONY DAVS550, I was wandering if there is anyone out there who knows what sort of DVD media my Home Cinema System will read, DVD-R, DVD+R or both formats?

What DVD-Writers would you recommend?
Ive come across with a dual layer one on both formats: NEC ND-3520 4x (DVDR DL)

Many thanks.