Thanks for letting us know how you got on with the monitor it’s nice when posters follow up with there decision, all too often I see posts that presumably are solved but the poster never completes the loop, it could be my age but I think it’s just good manners.
Now to my real point! decent desks cost a fortune and I wanted a large desk that felt like it was sturdy, the desk I inherited was a flat pack standard computer style desk with a couple of pull out slabs on slides for scanner and keyboard etc. And here is the cunning part, I went to the DIY store - here in the UK Wickes are local to me and bought a fire door! Heavy, nicely finished with teak top and bottom and 1981mm wide x 762mm deep x 44mm thick it’s 21.3kg so you may need a lift with it. On the plus side if your monitor ever catches fire you’ve got 30 mins before it gets to your hardware under the worktop. I have room for two monitors, keyboard and mousemat, monitor speakers, cd player, amp and two work lights. I was going to glue it or pin it to the old desk top but it’s that heavy I never bothered, also I left it untreated it has a nice smooth finish, you could wax it if you needed to or varnish it if want to protect it from the odd misplaced coffee cup!