Multi-angle is part of the DVD spec so all players have to provide it.
I own an NS300 and it's great. I can only imagine that the NS405 is much better. I would personally choose it over the Tosh as it looks nicer and the Tosh had some problems with disk compatibility a while back (which were since rectified with a firmware update). I've never had a compatibility problem with a disk on my Sony player and that makes me feel more comfortable with Sony players. Whichever one you get though, I'm sure you'll be happy with it. They both give out great pictures and sound.