Starting from scratch and say $5000

my original post (written, edited, then lost to the cloud) was: "Will I regret selling my McIntosh gear"  I will let it remain in the netherworld and rephrase as above. Truth is I bought an MC2155, C33, and XRT 18 speakers about 15 years ago but because of moves and family stuff, never got a chance to deploy them until this last fall when we became an empty nesters (not the speakers; bad surrounds). Lugging the heavy McIntosh amp told me I needed to sell it because I expect to be moving again soon and it is just too much of a beast that I'm also afraid to damage. But now that it is playing I am enjoying it, even driving mediocre 90s Acoustic Research AR208 speakers I had previously dismissed until hearing them with the MC power. Anyway. contemplating a completely new system to be financed with the sale of the Mc gear and even though I know this is an absolutely unanswerable newbie question, I need the therapy of talking about it to get any sort of orientation in the hundreds of brands and technologies of today. So here goes: I would like to put together a pre+amp+speakers somewhere around $7000 and have no idea where to start.

thanks in advance and apologies for such a vague question. details can follow

ps I like the sound signature of the mc but don't really know anything better; curious about class D. used is fine but not so much vintage unless it is still a value/performance contender. I like diy and projects but hitting 60 next year and starting to value my time in early (unplanned) retirement