Windforce is quieter, high levels of overclock, has UK RMA if something goes wrong, and currently is good pricing.
The motherboard comes with 4 SATA cables.
Not very good, you might as well keep the OCZ.
Not too bad looking at the review below:
http://www.anandtech.com/show/4908/silverstone-strider-plus-500w-modular-power/5
I would get the Thermalright True Spirit 120. It performs better than both of those coolers and is cheaper. It also performs only fractionally worse than the 140.