Buy an integrated amp when you have a preamp you already love? Nobody has explained what they mean by get an integrated because it’s better. What I think they mean is it is easier to get the preamp section and the power section to match with an integrated amp, than it is when buying separates. I don’t think separates was a scheme to get people to by more pieces.
As far as the whole "you need to spend most of your budget on speakers" That is not necessarily true. Maybe see if there is a high end store around you and do some listening. Magnepan .7 is a good speaker. They are only 1,400.00 new. There is a video on Youtube (and maybe Patreon too), where this guy is using those Magnepan .7’s with a Jays Audio CDT2, ($2,200.00), A Jeff Rowland 535 amp ($5,900.00), and a Stella D700 DAC($1195.00) and raves about their performance. I’ll post a link in case you are inclined to view it.
https://www.youtube.com/watch?v=CpJnupgiNIU
As far as the whole "you need to spend most of your budget on speakers" That is not necessarily true. Maybe see if there is a high end store around you and do some listening. Magnepan .7 is a good speaker. They are only 1,400.00 new. There is a video on Youtube (and maybe Patreon too), where this guy is using those Magnepan .7’s with a Jays Audio CDT2, ($2,200.00), A Jeff Rowland 535 amp ($5,900.00), and a Stella D700 DAC($1195.00) and raves about their performance. I’ll post a link in case you are inclined to view it.
https://www.youtube.com/watch?v=CpJnupgiNIU