According to reviewers on many sites the the R7 265 is the sweetspot between 270 and the 260X.
It also costs 150$, same price as the 750Ti, but performs about 17-20% better.
Now the 750Ti is king in terms of saving some power, the 265 does not takes huge PSU capacity so even the 430Watts or 500Watts would be more than enough for this GPU.
You've already seen 760K CPU + 750Ti, now my new replacement for the 750Ti will be the R7 265 hands down.
And yes it is a renew of the legendary 7850
What do you think of AMD move against Nvidia?