From what I understand, Western Digital has dropped their line of My Net products, and instead is supporting My Cloud devices. Those will be really fun to hack on later on as they get old and cheap (especially for distributed networking projects, no?) WD has already stopped offering support for the My Net products and have definitely stopped selling them. So eventually we will also run out of n600 and n750 stock. Plus, the price has gone up to near-MSRP for the n750:
https://camelcamelcamel.com/N750-Dual-Router-Wireless-Accelerate/product/B007KZQM9Q

Following the suggestion from Guifi.net visitors years ago -- to build our network to provide a good service experience, we should use new hardware (when we can) to get performance boosts from improvements to radio, power-management, and standards technologies. It seems like we may want to find the next router to support, and I'm curious what folks have looked at lately!

It seems the search may be for affordable, good quality, dual-band/dual-radio routers that are openwrt-compatible. Plus, devices that support new technologies like 802.11ac (Wave 2?) and 10/100/1000 MBPS wan/lan ports (more easily take advantage of fiber services from Sonic.net / Cruzio / etc). Interestingly, we may also find affordable options from brands like MikroTik that seem to have more US distribution than before if I recall correctly. 

Here's  my short list from quick research, lmk what you think: