Also; the Lingo squirts a load of gunk into the mains and generally buggers up other system components.
The first part of that statement is utter fallacy, based on folklore and abscence of facts.
The second bit is true, but easily cured, see http://forums.naim-audio.com/eve/forums?a=tpc&s=67019385&f=48019385&m=4611985852 for more info.
The only sense the Armageddon is in a different league is it's positively stone-age compared to the Lingo. It must, by design, leave the LP12 more open to mains related performance variation, something the Lingo effectively reduces.
I'm not for one second suggesting it doesn't sound great - it does, but it's not dramatically better than a modded Lingo. There are a few (only one that I can think of!) that disagree and have heard both options, and as with everything what it sounds like to you is what matters.
The Armageddon is an elegant solution for those that don't have the inclination for hacking around a Lingo, don't need 45RPM, and don't mind spending a lot of money on a box with very little in it .
The one thing I do know is that, without a single exception, those that have modded Lingo in accordance with my suggestion have preferred the final result, which gives me a warm feeling inside, and is a great relief, since it's not easily reversible