My daughter needs a new camera...BADLY....

So, we talked w/ a camera guy today and told us that this Nikon CoolPix was a good camera. So, we went online and I found these two....daughter loves that is slim.
I can't find any differences between these two, other than the mega pixels.
(one is 7.2 the other 8 mega pixels...and both have a 3 opti zoom).
Anyone have this camera? We read reviews on it and they were pretty much all GREAT!
S50 S51
THEN, he told us about this camera Kodak EasyShare Z1275, but most reviews said it was a very slow camera....we do NOT want that because that is what her old camera was like.....I like that it is
12 mega pixels and 5 opti zoom! But.......I am scared about the reviews!
Anyone have this one?
KODAK
Which one do you think would be better?
I believe Wal-Mart carries these cameras and they were both under $200 (I think) -- daughter is doing the online research!
Thanks (in advance) for your help and opinions!