Green-sum via eBay offers the Yamakasi Sparta 301 30" IPS LCD Monitor for $389 with free shipping. That's $6 under our mention from two weeks ago and the lowest total price we could find by $41. It features a native resolution of 2560x1600 and one DVI-D input.
Note that this 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.