i have been using a 14mp point and shoot for a couple of years.  i like to take macros of flowers, frost and bugs.  i want to keep zooming in on my pc to see deeper into the flower.  so i bought a 18mp canon eos rebel t4i.  with 2 kit lenses.  i am very disappointed because the pictures look the same and i can zoom in closer on the pc than with the old camera.  a 5:1 magnification macro lens from cannon is $1000.  should i get the Nikon 24mp for $650 or save up for the cannon lens?  would tubes help?  thanks