This is a "what if" scenario. I trying to see what we could build under ~$1000, although by using Linux we could spend another ~$60 to ~$80 on the i5-8400.OK build I guess. Is this a planned build or just a "what if" scenario?
I'd personally spend the extra at this point for a 6-core CPU, either Intel or AMD. Otherwise it would make sense to build a Kaby Lake build and save the money because the CPUs and motherboards are less expensive. If staying with a Coffee Lake build, I'd go with the i5-8400.
Most people can get by just fine with 8GB, and with RAM prices so high, it's best to buy only what is needed, and add some later on if needed when prices are lower. Plus, I don't think I would go with anything slower than DDR4-3000.
The other components selected are builder's choice. A person can get a Seasonic PSU with a longer warranty for about the same price on sale.
Looks decent, although with a six core CPU I would go with 16GB of RAM.
Well to be honest I am waiting a few years to save up some money and hoping that prices will fall on both DDR4 memory and SSDs by the time I build. My current rig is good enough for now.If a person needs it, sure. However, DDR4 is at all-time-highs right now, so it would only make sense if it's needed. I "only" have 8GB in my desktop right now because of prices, and it's not hurting me at all. I personally would use some of the leftover money to buy a bigger SSD.
I really like to build this one:
https://pcpartpicker.com/list/7YZwTH
Too bad I don't have the money to buy this...That looks good, but also big jump in price from the original but yea, if it works for you... you'll be set for years.