Build advice sought...

I'm planning to assemble a computer to replace my 11-year-old XP
desktop. This will be used for general computing and audio recording
and editing. No gaming. I'm planning to run Windows 7 64-bit on it, so
I want a CPU that's among the most recent and highest performing ones
that will support Win7. I might later feel the need to move to Windows
10, but not anytime soon. From what I've read, it seems that the Intel
i5-6500, i5-6600, or i5-6600k could make good candidates. Money is an
object of course, but not the primary one. My goal is stability and
longevity.

So, a request for comments...

- Are the Intel CPUs mentioned above good choices? If I understand
correctly, there may be some issues installing Win7 from USB devices,
but I can work around that.

- I still need to find a motherboard. It must have a PCI slot for my
old M-Audio AP2496 sound card. Any suggestions? I've had very good luck
with ASUS in the past.

Any thoughts you might have would be appreciated. I kinda lost track of
the state of the technology several years ago and I'm trying to get
back up to speed.