Andrze, that's basically what you're doing. You didn't hear the AKG-K1000 with equipment that you know or in a good, quiet setting (very important for these headphones) or being able to sit down (also very important for the K1000). I would say the K1000 is one of the most under-rated headphones on Head-Fi. They have the potential to be driven by some of the best amplification electronics made, not being limited to the small selection headphone amps available.
I would say the CD3000 was extremely over-rated, though I don't see much about it now. It was a very colored headphone which was either way too bright or way too syrupy. Namely, the Headroom Home made it sound extremely bright and the amazing Holmes Powell DCT-1 made it sound syrupy -- as did the Wheatfield HA-1. I was very much surprised by how much people enjoyed it.
I think that the Sennheiser HD580/HD600 is also over-rated. Many tout it as the most neutral of headphones and as some of the best headphones when paired with the Cardas or Stefan replacement cable. While I think its versatility is great in being able to use multiple cables (also great for the Blockhead), I don't think it is the most neutral or the most musical headphone around -- not by a long shot. While a very relaxed headphone and really very neutral with the Cardas cable, I thought the Grado HP-1000 (as well as the Alessandro-Grado Music Series Pro) bested the HD600 by a wide margin in most areas, falling only in soundstage size. Bass and drums are felt much more with the HP-1000, which provides a tight yet deep response. The bass response is deeper in the HD600 but not as tight, though the Cardas comes close. Treble seems somewhat veiled to me on the HD600 -- this is fixed by the Cardas cable, but the liquidity and naturalness of treble does not come with the cable. There's treble in heaps with the HP-1000, maybe too much for some people. But it's all the treble that's on the recording and it seems much more real to me.