Hey there Josh,
So cool you dig your 324 ...great guits, these, and the tas wood is a significant improvement, imho. Glad it's serving you well and that you're enjoying it!!
As for the K&K, lots of folks love these, and many a praise have I read about it. I installed one and simply could not stand it. And I tried to make it work ...different EQ, different preamps. Just not to my liking as there was a prevailing boominess that was insufferable, and a mids content that simply did not sound natural to me. Again, this with diff EQ, diff preamps, and (dare I say) knowing how to work EQ; and all this through a decent console into a PA. I had heard worse, to be sure, but it was not a system for me despite my genuine attempts. Some folks undoubtedly will call me out on this, and that's fine as we all hear things differently. But I tried in all earnest since I bought it and wanted to make it work.
That said, what did work for me was the LR Baggs: go either with the Lyric or the Anthem SL (which is the Lyric's mic along with a UST). The former is good and delivers natural tone, but may be limited if stage volume increases as feedback will come with higher volume; and is limited in your ability to shape its bass content. The Anthem SL fares far better if higher-volume situations present themselves (irrelevant if you use and IEM or have low stage vol), but also fares better with bolder bass, and a more "percussive" and dynamic feel. The UST offers that solid bottom end and greater gain-before-feedback. My personal take on this is that the Lyric is a genuinely good system, especially if the guitar is in a band setting where the guitar's bass content is far less important and often much dialed out anyway; but the SL offers more tonal latitude and overall versatility, and is hands down better if one performs solo as you can boost and shape the bottom end more readily ...important if the guitar is the solo instrument.
Either way, both of these sound genuinely good as acoustic guitar pickups. But any way you decide, consider also a quality DI to offer you the best signal translation to the console, as well as the ability to shape tone. These are quality investments in gear you make once, and then leave you lasting joy with solid tone you can enjoy for years to come. Feel free to holler out if you have any Qs.
Edward
