Lenovo offers its 5.5-lb. Lenovo Z50 Intel Haswell Core i7 2GHz 15.6" Laptop, model no. 59426425, for $579. Coupon code "UPSZ525925" cuts it to $549. With free shipping, that's $300 off list, $30 under our mention from last week, and the lowest total price we've seen for this model. It features an Intel Core i7-4510U 2GHz Haswell dual-core processor, 1366x768 LCD, 4GB RAM, 500GB hard drive with 8GB SSD, 802.11ac dual-band wireless, DVD burner, Bluetooth 4.0, webcam, 4-cell battery, and Windows 8.1 64-bit. Coupon expires October 1.