Well then.
I'd pass on the Alcatel. It looks generic, likely made by a company that either no longer manufactures phones, or primarily markets pay as you go models. A quick search bringing up primarily go phones and a tracfone make me think I'm not far off. If you want something that will actually last you, or a phone that isn't likely to make you regret the money spent, this is a hard phone to say yes to.
I'd pass on the Nokia. It's a Nokia, so, you know, brick status and all that, but frankly, that Nokia is ugly. Even a cheap phone should have a decent presentation, and considering it brings nothing spectacular to the table, I say it isn't worth your time just to save a couple of dollars.
The Razr flip phone is a great choice in terms of a phone that will fit in your pocket nicely, looks sleek, and does what you want. It's pretty inconspicuous in your pocket, which may or may not be a plus. I dunno. I'm not you.
The Rizr slide phone should be considered first and foremost though, as it does have a marginally better camera, is a newer phone (in terms of the phones on the list, at least), and doesn't even cost $1 more than the Razr flip phone. Reviews seem to praise how thin and nice it is, with very few gripes outside of the inconvenient MicroSD card slot location and some questionable speaker phone call quality. It really is the clear winner in terms of the choices you've laid out, and having played around with slider phones in the past, they are tons of fun to play with when you're bored.
So, you know, just purchase the Rizr because you'll be lucky if 10 different people reply to this thread.