I'm keeping an eye out, especially on SSDs, but the more I think about rebuying everything, I'm almost considering saving up and eating the cost of a whole new build. Not to mention, building a new PC is kinda super fun.
Eh, sure. if you are ok with paying full price up front then go for it. A suggestion for SSDs if you don't already know, Samsung is king for speed, with intel in a solid second, others vary from good to bad, but regardless they'll all be faster than hdd. Some of that you'll already know, but meh.
Adding new parts to an old pc can be "fun" as well.