I've held off getting the 4.0 set, as I wonder if there'll be a "complete Season 4 set" when this comes out.
Although that didn't with The Sopranos Season 6 pt.1 & pt.2, so maybe not. Either way I still have them all on my Sky+ anyway
No doubt there'll be less extras than on the R1 too, but its such a hassle importing them I'll live without
I wouldn't hold my breath if I were you. I highly doubt it, considering that at least in the US there was never a complete season 2 release, which was also split up in a similar manner