Mike, I'm joining this late but here is my take. Get a Kairn if you can find one with a slimline power supply for around $800 or so. This is way, way better than the Wakonda, and all the more so if you are going to use the phono stage. (Kairn Pro's do not have a phonostage. Standard Kairns usually come with both mc and mm options for phono, but make sure yours has what you need before you buy.) In buying Kairns you do need to be aware that there were three different power supplies used during its product run - the slimline is the most recent and best sounding. Do a web search on "Linn product history" and you should find a link that tells you for which serial numbers you should look.
As to the AV 5103, it is better than the Kairn and a great value. But be warned, these are not user friendly and if you are not technically minded are a bear to set up. (I had mine programmed by my Linn dealer for $30) The complexity comes from the fact that they are really surround processors that have great audio. They originally retailed for around 8K (as recently as 5-6 years ago) but can now be had for around $1300 or so. If you get one of these, buy one with the blue LCD display, as they are newer.
Of the newer Linn preamps, Im not a big fan of the Exotic more detailed than the 5103 for sure, but very lean. That would be the next price step up on the Linn market, as I a have seen them for go for $1600 used (new $3200). But the AVI preamp at the same price point (new) is a LOT better.