Oh lordy. This is going to create a cat fight in under 30 seconds...
Both have merits, both can go well and both can go horribly wrong. I would advise you to talk to you gynae and then go read up on some of the birth stories on this site as this thread is probably going to get quite heated.
Son, James, born 30 April 2010 by caesar
Baby girl due end November 2012