Asus H110M-A/M.2

An Micro-ATX board on the H110M chipset, LGA1151 socket. Expansion includes 2 M.2 slots and 2 PCIe slots. Memory support covers 2 DDR4 slots up to 32GB total. Pick the board for its socket before anything else — chipset niceties come after.

At $73.98 it sits in the budget motherboard bracket. PlanMyPC's builder flags compatibility problems automatically and tracks the latest motherboard deals from multiple stores. Support and warranty service run through ASUS, with terms that vary by region. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.