I personally dont think there is anything wrong with Linn/NAIM kit - in fact it's very good but IMHO there are issues. Until a year or so ago I was a dedicated Linn/NAIM chap LP12/Cirkus/Valhalla/Ittok/Troika NAP32.5/HiCap/250 so it doesn't come more purist than that. The constant talk on NAIM forums is PRaT (pace, rhythm and timing) and to be sure the "NAIM sound" is fast and dynamic (foot tapping)- in the same way that Linn KAN Mk1's were - but somehow I always felt there was life outside of Linn/NAIM - the problem was that as someone else has mentioned its all too easy to get locked into the corporate upgrade structure so rather than changing to something new (?better/different) you end up with more of the same because to make the change often means junking all your kit and starting from scratch - mucho moneyo
NAIM gear is bullet proof and they will service anything they have ever made so if you like the sound they make it can be a really good investment - I also think the chrome bumper stuff looks the mutts nuts and IMHO sound better than the later kit.
Linn - well in the early days they were pretty much the only game in town and Ivor was a pioneer but it was never cheap and still isn't - I also was never really sure the suspension was 100% - it may have been when the dealer set it up but then the trip back in the car and re-install? However, I still reckon the Troika was the best cartridge ever ever and I do miss it.
Anyway, I took the plunge and had a total change and have never looked back - The enjoyment I get from my current kit (see my profile or welcome post for details) is far more than I did with the Linn/NAIM stuff which was sterile in comparison.
As always let your ears be the judge - my view is if you like the Linn/NAIM sound and dont mind possibly locking yourself into a philosophy then buy it - it's well made, reliable, repairable and sounds very very good - I just like my kit better
Steve