Monoprice offers its Monoprice 30" CrystalPro IPS LED-Backlit LCD Monitor with Adjustable Stand for $689.33 plus around $24 for shipping. That's $702 off list and the lowest total price we could find. (We saw a similar model for $245 less last week but it lacked a HDMI port.) Features include a 2560x1600 native resolution, LED backlight, HDMI input, and DVI-D input.
Note: It isn't Mac compatible.
Most taxpayers will see their tax bill go down during 2018. That could impact which type of account -- traditional or Roth -- makes sense for you.