Don't know what brand name BMW of South Atlanta sells but it looks like they will sell you what ever BMW recommends for about $885 including all clutch components and dual mass flywheel. Don't know how much the the Sachs set up is but Sachs is supposed to be a better German OEM supplier company.
2000 BMW 5 Series (E12,E28,E34,E39,E60,E61) M5 Sedan Clutch
There's Turner Motorsport review but I am under the impression they're trying to sell you something.
From NightKrawler July 19, 2013 (Pg 4 I think on this Forum and he states he's the M5 Guru)
being the clutch isn't really a quick easy thing to change why take a chance. the clutch i got from south bend is 100% sachs parts, pressure plate, disc, and t.o. bearing. (So I guess Sachs is the supplier of clutches to BMW in Germany)
From MDA185 @ Bimmerfest
I have performed several clutch replacements on my bimmers over the years. This is not a job for most beginners unless you are motivated, have some good manual skills, and are willing to take your time and be meticulous until you have it all figured out. The procedure is 90% the same as for the 328i E36 and there should be many threads and write ups on the internet for that car. The Pelican Parts web site should also have a good write up for an E36 clutch job. I am guessing that because of your age and where you live, your only option is to take this to a shop for the work. Doing this job on a cold driveway in winter is not much fun. If you have access to a garage and a lift, this becomes much easier.
You don't say how many miles are on your car. I do not recommend re-using the flywheel on any car over 100K miles especially if it has been slipping a lot. When the clutch slips, it messes up the friction surface on the flywheel. You may get away with reusing the flywheel but if it fails after 5-10 thousand miles, you will have to pay for all of that labor again to replace it. That happened to me the one time I reused a dual mass flywheel with high mileage on it. I just purchased an 03 530i with a manual from an owner who did the same thing. He replaced the clutch at 110K miles but kept the flywheel. Guess what is failing a year later at 124K miles?
I am a big fan of the UUC single mass flywheel kit that includes an M5 Sachs clutch and pressure plate. It is much better than our stock set up while still being very easy to drive with on the street. By that, I mean it has very progressive clutch action and easy to engage unlike most high performance clutches. It costs a little more than OEM dual mass flywheel and Sachs clutch or the LUK alternative.
if you've got a welder handy I thought this was an interesting tool in case you're a do it yourselfer
Sachs Clutch Review - PureLocal
So, Hope this helps and from what I've looked at Sachs is the supplier of clutches to BMW. Hope this helps, happy reading and research