I think I know what my next purchase is: the TP-LINK Archer C7, as reviewed on Wirecutter [thewirecutter.com]. Hits all my criteria: fast, cheap, excellent coverage, and it runs DD-WRT. Because most included firmware sucks.
Microsoft, in their infinite wisdom, discontinued the perfectly good Easy Transfer program they had in Windows 7. I have to use third party apps to do the same thing in Windows 10. Really, Microsoft. -_-