The good news is you're retired so you have lots of time. This is a great opportunity to really have fun with this rather than viewing it as daunting. Since you've been out of the game for so long your hearing and tastes in sound have probably changed as well. You really need to re-discover what sounds good and what's important to you now, and the only way to do that is to go to at least a couple good dealers and see what stuff sounds good to you with your music. Trust me, it will be well worth your time and you'll be glad you did it. Once you can relate back what you found, in addition to you being better able to identify what you'd like to possibly try, we will also be in a much better position to make targeted recommendations for you to consider. I have a feeling once you get the chance to hear good modern equipment set up properly at a good dealership you'll be surprised at how amazing this stuff can sound and then actually get excited about the journey. And no, if I were you I would not even consider servicing your current equipment. To me, the ONLY benefit of going that route is that it's easy. There's lots of great equipment out there these days at very reasonable prices that will blow that stuff away, so it's well worth your effort especially now that you're retired. Anyway, best of luck.