I'm not sure of the benefit of keep trading up one small step at a time.
I bite the bullet early on and bought the RCF Evox 8 at the very beginning, and it's the one bit of kit I bought that I've never felt the need to look at replacing.
Long term, it's going to save me a lot of money, compared to if I'd bought budget speakers at the beginning and then kept slowly upgrading them a small step at a time.
Plus that are the ultimate in portability!