Matt, You really ought to take one or both of your troublesome phono stages to the home of an audiophile friend or to a local dealer, and listen to them on a completely different system. That way, you may figure out that the problem lies downstream from the phono stage, which very well could be the case. Likewise, you might borrow a known good working phono stage from a friend or dealer and see how that goes in your system.
That said, I have to agree with you that the fact you are having no problems with digital sources is puzzling. For a shot in the dark, you might check out what is going on with the interconnect cables you use between the phono stages and your linestage. Swap in some completely different cables, and try switching to a different pair of input jacks on your linestage; you may have a bad solder joint somewhere on the linestage side. Also, check whether said cables are passing near a source of EMI or RFI.
Further, if all else fails, based on the rave review of it by Michael Fremer, which I just read on-line, you might consider the iFi iPhono2 for only $499. You can tell when Fremer REALLY likes something, and I think that is the case with this unit.
Pursuant to checking out the Klyne 6LX, I did install it into my Beveridge system last night and listen to it for about 2 hours. It had been completely out of service for many months, so it took a while to "bloom", but when it did, the sound was excellent, as Raul predicted. It has the expected virtues of solid state: very low noise (actually no audible noise at all, even between tracks of an LP with stylus in groove), very good clean bass response, very good articulation of separate instruments. Plus it had virtues of good tube gear: huge sound stage, very good sense of depth, good retrieval of decay. Compared to the best tube phono I have heard on this system, there was a very teeny tiny slight bit of dry-ness. Not offensive, just different. But the trade-off was in favor of the virtues.
