Vulcano's assistant
Banned
Not always with an SSD, but for under $400 there are always some Acer/Lenovo/Dell/etc deals in newegg like this one for $350 (of which the new model is $450 on amazon)
At the i5 7400 level and under (more than sufficient for her needs) it is hard to beat the price of those prebuilds, especially when they are $100 cheaper just by being from last year.
For cheaper one could build a machine with an Intel Pentium G4560, but not one with a i5 processor, since you are spending $180-$199 on a retail i5 6400 or i5 7400.
and the r5 1600x (~300€, you can nearly get an i7 7700 for that price) aren't worth the premium price amd is asking for them. They have a higher standard boost clock but you can achieve similar clocks with cheaper r7 and r5 iterations. For the rest, it's hard to tell especially at higher resolutions as your gpu will be the more decisive and limiting factor here. But people tend to exchange gpu more often then cpus and mbs so looking at 1080p performance makes sense because next gen. gpus should perform at 1440p+ just like current gpus perform at 1080p and you'll most likely just get another gpu then a new gpu, cpu and mb in the next 2-3 years. 
