there's a few items i can call my "best money spent on audio".

-melos ma333r preamp. purchased ten years ago, upgraded over time, it still does everything right, imo. i have about $2k into it.
-vmps larger subs. paid ~$1k shipped, for a pair. upgraded w/megawoofers about eight years ago. one of the few products i actually bought new; these subs, along w/a marchand x-over, have improved any speaker i have ever used w/them. and, bass sounds
real. the past year or so, i have toyed w/upgrading, but i never pull the trigger...
-art di/o dac. bought new for $150 almost ten years ago, it's the first time i ever actually enjoyed digital sound much in the same way i enjoy analog. upgraded in stages over the next year, it yust kept gettting better; even now, i find it holds its own against well-regarded digital systems in the $2.5k-$8k range. not sure i can get anything any better. different, mebbe, but not better. if there is anything better, it is likely too expensive to be seriously considered, for what would be a tiny improvement at best. i am game to listening to new digital gear, but don't have any desire to upgrade - you can't squeeze blood from a rock...
-oracle delphi - purchased about 15 years ago, w/grace 727 arm for $850, upgraded over the years, now is to mkv specs; has hp power supply driving o-l dc motor, and o-l silver taper arm. unless i win the lottery, it's unlikely this will be supplanted in my main rig.
-pentagon ps3 fono stage. a $2.5k piece i nabbed for $600. i am sure i can do better, but not sure if it's something i could afford. this stage is extremely neutral and has excellent detail. s/s, it's not euphonic, but run thru my melos line stage, it's still wery nice
-deqx dsp x-over. not cheap, but it's amazing how much better speakers can sound when run thru it.
-any fm tuna

doug s.