That's as good a reason as any. The upgrade is as you say endless, and if you so wish you can spend limitless sums searching for the grail. There is of course no grail, the joy is in getting that little bit closer to your imagined grail. You can only ever halve the distance between you and the end point, hence the failure to ever arrive. Somebody earlier was ta!king about his student syztem, and the mix tapes he made for his girlfriend. He bought hifi to recapture that. That's perfectly understandable but any thought reveals it as futile. He can't go back to bring 19, having a lovely young woman around who thinks he's great, and discovering great music, it's gone. But he can chase it.
I think that you could be very happy with a relatively modest hifi. If it's really about the music, get something that all the househo!d can use, use it every day. I do a lot of cycling. My favourite bike? 25 years old, 20,000 miles plus, it's been used on and off road, it's been over Mt Ventoux in vile weather. It has my history written in every scuff mark. Would I swap it for a £2k bike? No, because the old dog is part of me, and maybe it is just the bike that gets booted round town, it's my bike for booting round town and it makes me smile.
Lance Armstrong got one thing right. It really isn't about the bike. It's not about yet another power supply either.