That's a strange dilemma, given that the two CPUs exist far from each other in AMD's portfolio.
A lot depends on your graphic card. Which one are you getting?
The 440 will be sufficient for most games at high resolution. Overclocking it will definitely make it more attractive.
But obviously, the 955 will exceed it in all benchmarks. Plus it will overclock more easily. http://www.anandtech.com/bench/Product/119?vs=88
Is the 955 worth the $105 over 440? That's for you to judge based on your intended usage.
If it was me, I'd get the 955.