First just a high level perspective. As a rule of thumb, to get the most out of your equipment you need to balance the sound quality of each of your components. To do this, you have to do a lot of research and carefully choose compatible and appropriate equipment. Assuming you are doing digital only then you need a streamer, DAC, preamp, and amp. Typically the ideal balance would be 35% speakers, say 15% streamer, 15% DAC, 15% preamp, 20% amp. Then later you can worry about cables and interconnects. So, Watt Puppy 7 were $22K, so, the appropriate budget would about $10K / component. This is a rough number to give you an idea of how to put together an optimal system around your speakers.
Not to say you can’t have a great sounding system for a lot less… but this is what it would take. I have heard outstanding systems centered around Rowland components, and I am sure others. Personally, I do not think you would get the most of them out of McIntosh.
So, the question is. Do you eventually want to have a spectacular system? One that these speakers are capable of? If the answer is yes, then you want to buy individual components and upgrade them over time as you learn about this pursuit. It is not a matter of just plunking down the cash, if you want a great sounding system, careful choice is required.
You can get great sound out of those speakers with $2 K components… maybe less. But they have to be very carefully chosen because high end speakers like Wilson can be very revealing of budget gear. Home audio is completely different than car. With automotive all nuance is covered by road noise.. leaving a cartoon characterization of the music. Home audio exposes layer after layer of detail and nuance.
We can carry on the conversation from here if you like. That is just a quick comment. You can see my system under my UserID. I have been pursuing great sound for over fifty years. The one thing I can say is, you got your hands on some great speakers.