I went with three MR2200ac by Synology.
I have been impressed with Synology's tech support for my NAS, so, though I have no experience with their wireless gear, I feel like that might be a good choice for longevity.
Yes. I replaced my Drobo NASs at home and in the office with Synology, and I am so happy with it. Just high quality products. I knew nothing about their network gear before this mesh project. I am quite impressed.
After one day (or two?) of operation, mesh network is still going great.