I think it's great that you are doing your research on epidurals. It's important to really know all you can before going into something. I would recommend taking some classes on how to deal with the pain, because most Dr.'s may not let you get one till you are 4 cent. and you may or may not be 4 cent when you start labor. I was 4 cent with my sec. a week before going into labor so I could have gotten one, but I wanted to do natural.
With my first I thought it was just normal to have an epidural, I was not looking forward to it. Then I realized it is normal but not manditory. So I decided I didn't really want one. I took classes on labor and delivery with my dh and with him I was able to handle the contractions. I had both waterbirths and they were great!!! Talk about relaxing and I was able to walk and move around afterwards.
It was a good thing I didn't have an epidural with both deliveries because I hemmorraged (sp?) and an epidural would have made it worse. I guess I don't really have any advice on epidurals because I never had one but just to let you know they are not manditory and good job for you to find out about them before

But here are some reasons I choose not to have one: (I am not saying it's wrong to have one, these were just my reasons)
Hypotension (Drop in blood pressure)
Urinary Retention and Postpartum Bladder Dysfunction
Uncontrollable Shivering
Itching of the face, neck and throat
Nausea and Vomiting
Postpartum Backache
Maternal Fever
Spinal Headache
Feelings of Emotional detachment
Postpartum feelings of regret or loss of autonomy
Inability to move about freely on your own
Loss of perineal sensation and sexual function
Prolonged First Stage of Labor
Increase of malpresentation of baby's head
Increased need for Pitocin augmentation
Prolonged Second Stage of Labor
Decrease in the ability to push effectively
Increased liklihood of forceps or vacuum extraction delivery
Increased likelihood of needing an episiotomy
Increase in cesarean section
Baby Side Effects
Fetal distress; abnormal fetal heart rate
Drowsiness at birth; poor sucking reflex
Poor muscle strength and tone in the first hours.
Doesn't mean all these or any of these will happen but I thought why take a chance for a few hours of uncomfortableness