Not planning on running 2 ext, just 1, but since most new monitor come in 1600 x 1050 resolution. I am wondering if either the Intel X3100 or Nvidia support this resolution. I had a old DELL running Intel GMA950 that does not have the 1600 x 1050 option.
nvidia should for sure, the intel should as well, however, it will consume a lot of your ram(shared memory) which may cause your programs to write to disk (virtual memory) which is significantly slower... end result slow performance... visit the dell website, configure a machine and you can compare specs via the pop up windows to get a better understanding of various video card options... good luck