There is a "golden ratio" for applying capital investiments to you system: Spend 50% on source material. Spend 25% on speakers. Spend 25% on every thing else.
If you have a system that gives you great satification, it is a shame to not have enough music to appreciate it.
Valves sound better to my ear.
You don't have to spend mega $ to get great sound.
Listen to music new to your ear. Worst case, you don't listen to it again. Best case you have a new genre or artist you enjoy. I scored a T. Monk album last week. There will be more to follow.