Newegg offers the Asus Z97-A LGA1150 Intel ATX Motherboard for $144.99. Apply coupon code "VCO" and checkout with Visa Checkout to drop the price to $130.49. With free shipping that's $10 under the lowest total price we could find elsewhere. It supports up to 32GB RAM and features two PCI-Express 3.0 x16 slots, one PCI-Express x2.0 slot, two PCI-Express x1 slots, four Serial ATA 6Gb/s connectors, four USB 3.0 ports, two USB 2.0 ports, and one HDMI port. Deal expires August 25.
Note that the above coupon can only be used once per account.