What is the difference between Enbrel, Humira and Remicade?

I went and seen my Rheumatologist yesterday and he is thinking of switching me to Humira or Remicade.  The swelling and inflammation throughout my body has went down significantly since I started the Enbrel but my elbows are still inflamed, painful and swollen.  My Rheumatologist completed an ultrasound of my elbows and showed me where my synovial linings where being damaged.  Does anyone have any experience with Humira or Remicade that can share some information on either medicine (side effects, effectiveness or etc.)?  Also does anyone know what makes either of these better than Enbrel?  I guess I am just a little confused and reading the pamphlets given by the doctor does not help much in informing me why it might do better than Enbrel.  Thanks in advance for any information shared!  It is funny to me but it seems like the more I research this issue the muddier the water gets!