They are all nice names, but there are a lot of them around so I'm slightly bored of them all. Jessica feels dated to me, I knew lots in the 80s and 90s. Ditto Amy, but much better spelled like this than with -ee. Isabella is ubiquitous atm thanks to Twilight, but I do like its Victorian feel. Sophie/Chloe are Greek and timeless, lovely names if you aren't bothered by their having been in the top 10 forever.
I used to like Chloe, the I read on MN that 'it's done well for a name that sounds exactly like someone coughing up phlegm'(sorry, horrible I know,) so that put me off. I think of Twilight immediately when I hear Isabella or Bella and really dislike Izzy. Sophie is beautiful, but very popular atm. I'm not the keenest on Jessica, because it makes me think of 'dessicated'. It is also very popular. Amy is 80's/90's, but still a nice name, less popular than the others. So in short, Amy.
I really like Amy. Hate Isabella but I'm still scarred from a really annoying girl at school and I can't get over it. That name brings back bad memories. Assosiate names with people I know...Amy was one of my closest friends at school.