Go with a Sony DRU-530A burner if there is one in your area. It burns both +R/RW and -R/RW DVD discs, and can also burn CD-R's.
If you need more info, just ask me. I'm on anytime.
Hmm. Turns out there IS a Sony DRU-700A DVD+R/RW dual layer burner, upon further research.
Interesting, but I'd probably rather wait until Blu Ray comes out.