Two WQHD external monitors
From Apple.com's Q&amp;A section:


  The Mac Mini has two video outputs: a mini DisplayPort and a mini DVI port. The mini DisplayPort is the same one you find on the current generation MacBook, MacBook Pros (as well as the Mac Pro) and the mini DVI is the same as the on the old black/white macbook.


and:


  For 1920 x 1080 connect mini display port to DVI or HDMI. 
  For 2560 x 1440 connect mini display port to DisplayPort.


All you need are the adapters to connect the monitors, the Mac Mini will be able to handle both displays.