Go to your local computer store and look at the sizes in person. 24" is fairly small by today’s standards and you may prefer 27", especially as you are approaching that ‘grey beard’ age and vision starts to go… :-)
Also look at the panel tech for whatever size you choose and read up on pros/cons of different panel types and what trade-offs you are willing to make to choose one over another.
Upgrade ship weapons to as high a particle beam as you can. Buy and use ship parts. upgrade your shields.
He stops handing them out for a while, but does restart eventually.
Also if you choose to do a multi NG+ run, any temple powers you do not pick up are available in a later one. What I mean is, if on your first NG+ game you only upgrade 3 powers to lvl 2, the next run will (eventually) let you get ALL powers to lvl 3.
If you’re really thinking of a 3rd monitor, depending on your financial situation, instead of a 3rd 27", consider a 34" as a centre monitor with the 27s flanking it on the sides. Also make sure that your video card has the capacity to drive that many pixels. (roughly speaking a 34" ultrawide is about 1 and a half 27" monitors)