Question : Using ghost and sysprep or ghost and newsid

I manage a large network that has floods of new computers every year.  What I do is simply install all of the programs and updates on one and ghost it to an image.  I then put the image on all the new computers, run newsid and join it to my domain.
I have been reading about sysprep and ghost and I am wondering if there is a better way to do what I am doing.
My way seems to be pretty straight forward and it works.  The only problem is storing all of the images.  But disk space is cheap now so it is not a big deal.

Answer : Using ghost and sysprep or ghost and newsid

The advantage to Sysprep is it give more options then Newsid, but Newsid is just plain easy to use.