i5-8400 vs i5-9400F

Good afternoon. Have the opportunity to replace your i7-4770's mother and RAM to a more modern. Saw the prices, came to the conclusion that I could make it and i5 of the new generation. It is better to order the i5-8400 or i5-9400F (1.5 K more expensive, will be delivered in two days). The mother will take B360 chipset + 16 gig RAM with two straps. Budget want completely, you can even add.

In games play rarely, mostly not particularly demanding. Basically the work is going. Plan to add 970 EVO M. 2 SSD. And I think because.

Now mother+percents+RAM expect 30-45K