There is no ghosting issue with ones made after March 2011.
They fixed it the issue mostly.
Sure there is some very slight ghosting/blurriness if you perform a proper test with white/black background etc and very fast moving objects, but nothing that other monitors don't have already, you won't notice it in anything, only proper ghosting tests.
The difference between the VE248H and VE247H is that they have different ports(48H has better ones and more) and the 48H is 24inch and 47H is 23.6. Down to what you want, the screens are exactly the same quality wise.
The samsung screen is what I was originally going to get, I went to a local store and took a look at it, didn't like the colors too well, but they didn't allow me to change the settings, So I'm going to guess the colors are very nice, Samsung always make quality products.
And the dell is a e-IPS screen, so it has better viewing angles, richer colors, with the sacrifice of a higher response time, which like most other monitors you won't notice it unless you look for it specifically with proper tests.
I only went with the Asus because I like Asus products (my graphics card) and the base is really small so I can push to right against the wall without the screen sticking out so much.
You could also consider
http://www.overclockers.co.uk/showproduct.php?prodid=MO-071-IY&groupid=17&catid=510&subcat=
Which is highly regarded for the quality of it, anyone in here will say its a really nice monitor. I just didn't like the base as its quite big.