yet another KAB mod question

So which of the upgrades are most highly recommended? And while I'm at it, is there any meaningful difference between between the three available models of the SL1200?

Drubin KAB's website has a comparison chart on the differences between the tables. But basically
lamp/standard arm,LED/standard arm,LED/titanium finished arm with OCF wiring, and adjustable braking on the 1210M5G.

Kublakhan: KAB's Clamps are either friction fit or screw on because you shouldn't put a heavy record clamp on a direct drive, the platter is floating on magnets. This thread should have stated Technics SL1200 models to help clear this up.. otherwise you are correct about different clamps.

10-30-07: Drubin
So which of the upgrades are most highly recommended?

Most agree the fluid damper, tonearm re-wire and outboard power supply are the most effective upgrades.

If you're going to do the tonearm re-wire, then there's no reason to buy a Technics with factory upgraded wiring. Some owners are quite happy with the upgraded factory OFC wire, however.

Lack of azimuth adjustment is the only downside of the Technics arm, IMO. I purchased a ZuPreme headshell with azimuth adjustment, but Sumiko also makes a headshell with adjustable azimuth. Each costs about $50.

I also believe the Isoplatmat ($99) is effective. It's made by Sound Dead Steel, which is a company that specializes in industrial vibration control steel and aluminum products. No snake oil here. These products work as advertised. Do a Google search for Sound Dead Steel and watch the demonstration video for the Isoplatmat.

What about the external power supply, fluid damper, and strobe disabler?

Clamp vs. no clamp is not a subtle difference on any table, and IMHO clamps work differently and better than weights.