the new i5s are way more expensive than the pentium g4560. $120 more for the cheapest one.
the new pentiums like the G4560 have hyper threading, 4 virtual cores, and great single thread performance. they are beastly little cpus, and simply cannot be beat for price. not to mention, the socket used allows for upgrade to very powerful cpus if you ever want to.
cpus like the one in the original post can be salvaged out of used pcs that people sell for cheap, so imo not worth it.