B&H Photo Video offers the 4-lb. Apple MacBook Pro Intel Skylake Core i7 2.6GHz 15.4" Retina Laptop in Space Gray for $1,799 with free shipping. That's tied with our mention from two weeks ago, the lowest price we could find now by $191, and the best deal we've seen.
The MacBook features the Touch Bar — a touchscreen OLED strip running above the keyboard that supports Touch ID and allows for customized buttons. Other specs include an Intel Core i7 2.6GHz quad-core processor, 15.4" 2880x1800 IPS LED-backlit Retina Display, 16GB RAM, 256GB SSD, Radeon Pro 455 2GB graphics, 802.11ac wireless, four Thunderbolt 3 ports, and macOS Sierra.
Planning for retirement savings to last until you are 90 or older is a daunting job. Make these errors, and the task goes from "difficult" to "impossible."