Amazon offers the EnGenius EnMesh Dual-Band 802.11n Wireless Mesh Router 3-Pack for $266.34. Clip the $40 off coupon on the product page to cut that to $226.34. With free shipping, that's the lowest price we could find by $40. This system achieves wall-to-wall wireless coverage with AC1200 speeds and features Bluetooth and a free mobile app.

Update: Coupon info has been corrected.