I'm going to agree with everyone else's posts on this. Assuming you've got a 1920x1080 @ 60Hz monitor, and you're fine with 60fps, you're good to go - maybe a bigger SSD, but not outright necessary.
Potentially, depending on the size, what's comfortable for your eyes, etc., a bigger monitor - but I tend to be a fan of larger monitors of the same resolution than most other people are (ie: I had a 27" 1920x1080, my son has a 34" 2560x1080 and he and I both think it looks fantastic, etc)