http://www.cpubenchmark.net/ rough benchmarks of all cpus, gpus and hdds. According to this the 750 is on par with the q9550 and the 930 is quite a bit ahead. And the amd 965 is on par with the 750 and q9550 but thats due to its stock high clock if you OC the intels will run circles around the amd.
Stock clocked the 965 will outperform the stock clocked i5 by a rather large margin. In other apps they are pretty much equal. If you OC them however(because the i5 is VERY conservitavely clocked) the 750 will indeed rape the 965.