Iv'e had a Wakonda for a few months now and am impressed overall. I'm strictly a two-channel type as well. I recently spent some time in my dealer comparing the Wakonda to the Kolektor. (I'll fill you in on this comparison even though you asked about the LK-1, with which I have no experience.) The dealer had the following system on hand: Rega P3/RB-300/Rega Exact/Linn Kolektor/Linn LK-140/Linn Ninka passive. My system is similar: Rega Planar 3 with the Rega power supply upgrade/RB-300/Grado Sonata/Linn Wakonda/Linn LK-85/Linn Keilidh passive. While the height, airiness, and expansiveness of the soundstage of the Ninkas (in addition to better-defined mid bass)was a major improvement over that of the Keilidhs, I was struck by a slightly warmer, less well resolved, slighly more 'veiled' sound coming from the dealer set up. I noticed considerably less detail, resolution, and articulation. The Wakonda, therefore, still seems to be a much more revealing and more musical unit than the Kolektor. In my opinion, it is aging well. The caveat to this line of reasoning is the simple fact that the phono pickups were different. But I just can't imagine that many of these detail and resolution problems resulted from the pick-up (I am not too familiar with the Rega Exact's properties versus the Sonata). Because the LK-140 in the dealer system would result in greater punch and resolution compared to my LK-85, and since the turntables and arms were essentially identical, one has to form the tentative conclusion that the Wakonda is still a considerably better unit (versus the Kolektor) when it comes to revealing detail in music. So, I remain pretty impressed with this pre-amp after my listen.
When I installed the Wakonda in my system, however, it did reveal weaknesses in other areas: The Planar 3s lack of rhythm and pace is all too apparent now. Moral? Get a Wakonda. It's a good, revealing pre-amp, especially if you can find a recent model on the used market. But be prepared to address front-end issues later, which may become more obvious as a result. And make sure you get a recent-spec model with the 'Brilliant Slimline' power supply!