best upgrade for 'standard' LP12

I think the best money you could spend would be to ditch the Grado and pick up a Dynavector cartridge. It will seem to do almost everything a Lingo will do - although the Lingo or Armageddon are definitely worthy upgrades - for a lot less money. The Grado adds to the LP-12 "bloom" in the midbass, and a Dynavector will tighten it up A LOT - and increase detail & dynamics in the top end as well. A DV-10X4 MKII or, if you can swing it a DV-20XH, will improve your system the most, for not a ton of money. Make sure you buy the cartridge from someone who knows how to install it - there's no faster way to ruin a good Linn than just slapping a cartridge in the arm and thinking it will work perfectly. There IS a skill to cartridge installation - so seek out a qualified dealer - please!
Best of luck,
Ed

By far;the best upgrade for a stock Linn is the AC cord ...
you will be good for longtime before next move.It's dramatic

thank you Egross but my pre amp needs a fair amount of signal which is why I bought the Grado (4.5 mv version) the Rogue is known for having a little noise in the phono section. Plus my cartridge is pretty new so I will stick with it. I had considered the Dynavectors in the beginning.

Praudio thanks for the vote of confidence on the PC I will do that the next time I get my Linn tweaked.

Put the LP12 on a wall shelf and then later on get the Cirkus upgrade, both of these will greatly improve the LP12 sound and will take away any midbass hump.

Praudio - I am curious to know more about the change you made to the stock power cord. Which power supply do you use and what aftermarket power cord do you use?