Our house and my business are both Mac-based, although I sometimes have the opposite problem in that I need to deliver software for PCs.
Macs are great. Or different. Or rubbish. Depends on who you talk to.
My pros
Well built - Despite some good efforts by some PC manufacturers, I've yet to find something that feels as solid
Long life - Mrs Dr Bollo's old MacBook Air is still perfectly usable with the latest version of the operation system after nearly 10 years.
Good support if you've got a Mac Store nearby.
Generally a better user experience than Windows
Unix based under the hood (won't matter to you, but I'm often in the Command line)
Better software support for creative-type jobs
My cons
Expensive
Proprietary hardware - You should be ok with a HDMI compatible monitor, but you'd still likely need a Mac-specific mouse and keyboard.
You'd need to relearn some basic tasks - single button mouse, keyboard shortcuts etc. Don't underestimate this!
You'll need to relearn some less basic tasks - backups, installing software, networking, how the file system works are all quite different. Not hard, but different.
Keyboard. Some people swear by mac keyboards, but I find them a bit 'hard'. Can't explain it well, but the feel isn't quite right for me.
Difficult and expensive to upgrade - unlikely to be a problem for you, although you'd need to check the double-monitor/laptop+monitor situation.
Closed ecosystem - unless you're happy down and dirty in command line, Macs tend to be more controlling over what happens on the system.
'Finder', the file system viewer (the equivalent to Explorer on the PC) is garbage. Apple have never got this right.
You will look like a hipster in coffee shops.
Expensive
I'd have no problems buying a refurbed more recent edition Mac from a reputable source, but a new Mac Mini might also fit the bill as long as you can confirm the support for 2 monitors. You're not exactly hammering the processor, so the spec doesn't have to be crazy.
I wouldn't recommend trying to run a Mac virtual machine on a PC. Life is too short.