"I did not hear the Lingo but come on guys, be serious, was the Linn's Valhalla motor circuit the entire reason for the Linn's mediocre bass performance?"
Jafox:
Actually, yes. The lingo adds what seems like another octave to the bass over a Valhalla, and that is just the beginning of the improvement. I've owned both and know the difference first hand. It seems crazy that a power supply alone could do this for a table, but it does for the LP 12.
As to your comparison of the LP 12 to other tables, keep in mind the version of the LP 12 you were using -valhalla, cirkus, ittok - can be had for around $1500 on the used market. There is nothing I have heard in this price range that sounds remotely as good. The same is true once you add the $1000 a Lingo costs on the used market - it is still far and away the best I have heard for the money.
Where I think people choke on the LP 12 is the idea of buying one new. I suspect this is a very fair criticism. (But incidentally, not the question raised by the original poster.) I haven't heard enough tables in the 10K range to say for sure, but I would be surprised if you couldn't do better than a Linn for this money. (But I should say I have heard Clearaudio tables and greatly prefered my much cheaper used Lingo'd LP 12.)
But I do not own stock in Linn, nor have I married the equipment. And by no means have I done all the A/B's I would like to with other tables. I am always on the look out for things I like better for the money. I would anticipate that if I don't end up replacing my LP 12,at the very least in a few years I'll be like Narrod - the happy owner of more than one high end table.
As to set up, it IS a big issue. Perhaps not for you, who have taken the time to learn what you are doing, but this in no way describes the average guy picking up a table on ebay. And if not set up properly, these things a less than half of what they can be.