Best Mini PC for Office

I am a bit overwhelmed with the volume of different mini computers, and I am not knowledgeable about specs or brand names. I am looking for recommendations for a mini PC to be used for office applications and can handle 4 - 5 applications running simultaneously without lag. No gaming or video editing. Criteria:

  1. PC not MAC. I like MAC (everything else I have is Apple), but I read MS office for MAC can have performance issues.
  2. Able to function with Teams & Outlook active while researching on the internet and using Word/Excel/PowerPoint. Ideally this along with a Teams or Zoom meeting.
  3. Reliable. No cooling issues. Or do I need to get something aftermarket to keep it cool?
  4. Handle at least 2 monitors (3 would be better). Maybe this is moot since I will use a docking station?
  5. Under $600 if possible.

I read here some manufacturers have malware pre-installed? Crazy. Recommendations on which ones to avoid would be great, but I can get an antiviral program if necessary.

To handle multitasking, I read I should have 16mb RAM, 500mg HD, and around 3ghz processing speed. Does that sound right? I don’t understand the i5 or i7 or whatever other processor. What should I look for?