I fought with mine (L4/L5) for 5-6 years. Did everything from chiros to a dozen epidurals. Finally made the decision to undergo fusion when the fire down the legs wouldn't subside. I was a 37 year old walking with the list of a 87 year old. The epidurals bought me a large chunk of those 6 years, but the fusion has been a small miracle for me.
Get yourself a few good opinions, but don't be afraid of the epidurals. For some, that's where the pain ends. If you go that route, get the painful anesthetic shot before the epidural. After about my 6th, I decided I'd man up and take the little pill under the tongue. Mistake. Not only does that pill leave a turd taste in your mouth for about a week, it also lets you feel enough of the epi to make you really wish you couldn't feel ANY of it.
Good luck brother.