Hey Njord
I got a little experience with tandberg. Here goes: about a year ago, a friend of mine went searching for a little reciever for his mum, and seeing as he used to have tandberg 3009 monoblocks (until the repoman came) , he bought a little tr 220. When we heard it, even with its measly 12 watts, we were instantly won over. It had everything but bass.
So we went searching for the bigger boys, and have since collected quite a few between us
In my opinion, and indeed, it is that of my friend too, the blue dials (tr 2025, 2040, 2055, 2075 are better than the white dials (tr 2030, 2045, 2060, 2080) . I have heard or owned all but tr 2040 from the blue series, and 2030 and 2080 from the white series, and I'm guessing that all things being equal, the traits apply to those aswell.
The blue dials sound absolutely great, even the little 2025. Offcourse, they get more and more control the higher up you get, with the 2075 in a class of its own. Sooo much power and control!
But as I said, even the little 25 watter sounds great, just a bit loose in the bass. I would take this one even over my own 2060. The white dials are quite a bit brighter sounding, and seems to lack the balls of the blue ones, allthough not bad at all.
My experience has been the earlier the better. The reason seems to be that build quality got compromised over time, and they started using more and more japanese components of inferior standard. The earlier the model, the better the components, and so I would definately go for a blue dial, and prefably an mk1. It can be distinguised by the mk1 having a black piece of plastic on the knobs, whereas the mk2's have an all metal knob.
As for reliability and parts - well, quite a few of them have had problems, usually with the left channel. But then again, quite a few of them have been just fine after a little cleaning. It seems they are quite sensitive to transport, so make sure seller pack it as well as possible.
Some parts are quite hard to come by, like potentiometers, which have a special output for loudness, and I think transistors are unobtanium, though not quite sure. Anyway, the big transistors seems to hold up well, and I think there are suitable substitusions for the little ones. Don't hold me to that though :scratch2: .
A big problem seems to be bad solderjoints, and the tuner needing adjustment.
I hope this will help You decide, and that I haven't scared You away from tandberg. The truth is, that I love the tandberg sound to a point where I just aren't interested in getting anything else. I finally got the sound I was looking for

..
-tom