the deleted scenes on the 1.5 release are good quality, the're letterbox not anamorphic, you can watch the film with the extended scenes included although it doesn't work too well, as sometimes you get two versions of the same scene one after the other.

The reason there aren't extended versions is because the deleted scenes are largely pointless, there are a few more deleted scenes for X2 so it might be worth it, I was thinking of putting them in for my own enjoyment.

X3 looks like it will be great, I always liked Beast so I'm glad to see he's in it, I just hope it rounds off this trilogy nicely.