When the discs rupture, the contents leak out and can squeeze the nerves exiting the spine.

Some doctors now can repair this easily (in the past not so).

Compressed nerves then hurt..send pain signals.

You should discuss with your doctor what would be best for you.

And you can also try some Lidoderm patches on the back to help with pain.

You see, if you have compression issues, taking other supps may not really help you much. Many of the other supplements are for improving the cells' functions when damaged by toxins or drugs. Compression is totally different. The axons are damaged, so using your list with added EFAs (essential fatty acids) may help repair them. Also nerves can get into the firing mode and not quit...that is what the Lidoderms are good for.

Do you have any cartilage left in your knees? If so, then SAMe may help. In fact it would be far better than the glucosamine mix you take. Long term use of NSAIDs like Celebrex over 6 wks actually prevent healing in joints. This is because some Cox-2 cytokines actually are healers. (some are inflammatory, some healing). So while in the short run NSAIDs feel good, in the long run I believe they do more harm than good.

I used SAMe for about 10 yrs and rebuilt my right knee. I avoided a replacement using it, and my left never followed suit as predicted by the Ortho doctor.

There is even a study showing Lidoderm equiv. to Celebrex in pain relief in the knee. If you want that I can search for it and put it up here.

So at this point, I'd just keep what you are doing, and add fish oil, daily. Start at 3 regular strength, or 1 or 2 double strength and see how you feel in about 2 months. Fish oil also helps with inflammatory pain, and improves the cardiovascular system.

Another great anti-inflammatory is Curcumin. I use Curcugel-500 which has a improved absorption rate promised.
But Doctor's Best makes a nice one too, since you like that one.
Curcugel-500:
http://www.epic4health.com/cuul500mgena.html
Curcumin has some nice studies out now about it...reducing inflammation in the body and in arteries. So it is very helpful for preventing heart disease as well. It might help your back some too.
The Doctor's best version has Bioperine in it...which is an enhancing pepper extract. It is nice because Bioperine is showing some lipid lowering potential in a new 2009 study.
I've been using the Curcugel since Jan and it has allowed me to back off the SAMe a bit. (can't give it up totally tho).
I use NatureMade SAMe BTW.

NSAIDs do deplete folic acid...so you can continue a good dose of that in your list.

So this is what you can try for now. All these suggestions are to help with arthritis and the back pain.

SAMe can be started at 200mg a day in the morning on an empty stomach. I needed 600mg daily for a long time to keep my knee quiet.
But now I am doing 400mg every other day and the curcugel daily.
Some experimenting is necessary to give a more personal result IMO.
You can get SAMe at Costco affordably, or at the RiteAid/Walgreen's Buy one get one Free. If you get generic make sure it is blister packaged since inferior SAMe comes in bottles with loose tablets.
Don't take SAMe after noon, as it may keep you from falling asleep!
(the added energy in the morning is usually welcome in chronic pain patients!)