I can't imagine wearing neoprene anymore. Those things are barbaric.
What's your recommendation? Neoprene is an improvement over the old rubber/canvas style in that you have more freedom of movement and they are warmer, but they don't go long without springing a leak at a seam.
I have a cheap (I'm all about cheap) lightweight pair made of PVC that at least haven't deteriorated with time. I use them before the weather gets a bit chilly. If they were bigger I could put on more socks or a felt liner for use in the cold.