I still have old Samsung 840 Pro's and they don't seem to be
that much slower (3 seconds absolute maximum slower) than NVME or my Optane drive. Optane is of course blazing fast (to be faster by a second or two in the realm of SSD's is impressive) but it doesn't really mean much for game load times overall.
We're not really talking the minute + saved by swapping to an SSD from a HDD anymore, it's more like slicing off a couple extra seconds at most.
For example read
this article about Anthem game load times
About monitors, those are some very slim pickings. You can't buy the monitor separately? There is a tiny screen in the 1440p range but unless I am overlooking it, I can't see a 4k one? If you absolutely have to pick from all of those, I'd look into the 35" one, assuming you can fit it on your desk or wherever you are. The 27" and lower ones are all TN panels (which are absolutely worse in terms of color).
Monitors can be the weak link, as the lack of contrast and color takes the fun out of games sometimes and the 35" one is the only one of the bunch which isn't a TN or tiny. It also has freesync, which recently Nvidia allowed to work with their cards to an extent, it won't be the exact same experience as Gsync but it will be similar. I'm not sure it is officially supported (couldn't see it on the gsync compatible list) but 10XX and 20XX cards both support freesync to an extent, now that Nvidia "officially" released the drivers enabling compatabiltiy for that, so it should work. I wouldn't settle for a 1440p 23.8" monitor, that's tiny and also TN which means bad color.
1440p is best at 27" or more.