I’ve learned that I have to hold something in my hand, set it up and use it, live with it for a little while, before I know if I’ll like it. Some of that is build quality and control feel, some is sound, some is ineffable.
I know this is easier for some than others, but I would try. Get used gear and resell it when you’re done. It’s really worth it. It’s the only way to really grow in this hobby.
Give yourself time to get used to it too. Your brain will become accustomed to your old gear sound. New gear might sound…off. I’m not sure I buy into speakers needing “burn-in” time (aside from maybe AMT tweeters), I think it’s something manufacturers say to give your brain time to become accustomed.