notebooks only have one port for external monitors. So.. you can only run one external monitor plus the lapotp monitor. If you are getting a macbook pro I would go with the one 30" or one 23" as they are both big.. What do you plan on using the mac for?
As for the new monitors.. I have no clue I have not heard anything so I'm sure its going to be a bit. Maybe by Q3 when new intel chips come out (and I hope a 23" imac intel

)