That new old stock (NOS) Acoustic Research Teledyne Synthesized Tuner T-06 on eBay for $130 shipped may not be such a good deal. The important thing to clarify is that the mid-fi mass-market company called "Acoustic Research" is/was completely unrelated to the hi-fi company Audio Research (maker of your excellent LS-16 Mk II preamp), and the name similarity has often confused newcomers to high-end audio. If you have some time to explore, a wonderful and reliable source of information and reviews can be found at
http://www.fmtunerinfo.com, which can help guide your choices when shopping for a higher-end tuner. Some (but not all) older "analog" tuners outperform synthesized tuners like the Acoustic Research. The only downside to adding a good FM tuner to your high-end system is that, for best results, you'll want to have a good antenna (ideally on your roof) to receive the best sound quality from your local stations, depending on where you live. Your honesty and enthusiasm for getting the most out of the fine system you inherited is refreshing!
Best wishes,
Mark Hubbard
Eureka, CA