No experience on the matter so don't take my word for it but:
Current Apple Hardware do not support DVD-HD nor BD.
There is no current apple player for any of those.
But at least Toast allows to burn BD and my guess is that FCS does it too.
So my guess is that in few months, leopard will have the features to read/write and support hardware for dvd's next generation... until then you're better off waiting (price might get a bit down in two/three months)
As for your combo of Windows/dvd-hd/bd player i can't see why it would fail (but then again i do not use window)