Is the i3 8350k worth it for $169.99, is it basically a i5 7600k/ i5 6600k which has similar gaming performance to a i7 7700k, and does i3 8350k have similar gaming performance to i7 7700k?
Yes, I agree with the above and I have firsthand experience. A 4 threaded cpu should not be considered for gaming when 12 threaded CPUs like the 2600 exist for less money, have cheaper motherboards, and include a stock cooler.
R5 1600 for $80 or rather essentially $50 with that $30 mobo discount. There is nothing than can beat this one for bang for the buck, and at $50 it would probably not be beat for a good long while.