I got a secondhand LP12 a bit over a year ago at this point. I've been happy with it, but it does have severe limitations which make it expensive to own. I bought mine with an Ittok and a recapped Valhalla + DV 10x5 + Trampolin + new silver tonearm cable, and a few other things. I took it in for service + a rebuild at Accent on Music in Mt Kisco. They were very nice, but were urging me to make a lot of upgrades. Considering the money I had already put into the service + purchasing the deck initially, I would just maybe switch to a more versatile player that could handle easy change of cartridges and maybe my 78s -- like a TD124 or a new Technics 1200G. I've never had either to compare, but if I do end up leaving the LP12, it would be towards consolidating my two separate systems into one. Don't know what type of record collector you are, but would consider this if you are thinking the LP12 would be your final deck.
I would also add that if you are moving around at all -- or an anxious person -- the whole question of whether the LP12 is tuned and in proper set-up, is also something which can drive you nuts. Best stay off the LP12 threads for that !
EDIT: Would also add, if you collect any experimental LPs which make you play with the speed of a record, you're out of luck with the Linn.