Should I get CAT SL-1 mkII updated to mkIII?

Gregm, It is the line only. Why do you say to think twice? Is the line only not that much better updated?

Avguygeorge, The price is $675 for my model of the MKII. Ken said that prices differ depending on the serial #. He said they made some improvements throughout time with the MKII. If my serial # was about 50 earlier it would have cost $875.

Pal: not that much better to these ears. Fact is, I don't exactly remember what was improved... I *think* upper end extension.
An update will also mean that the unit will be checked overall, so that's an extra bonus.

I definately prefered my MK II version. Wish I had NOT upgraded.

Hi, I also had my MK II update to the MK III and I also didn't hear $700 of upgrade.

Kawika, what did the upgrade do that you din't like?

From the comments so far it seems I may do better to just retube the MKII. Any suggestions on good tubes to use. I have read that CAT preamps will eat up certain brands.