Definitely the second set.
Your entire rig won't even consume anywhere CLOSE to 750w, so in this case, the lower the wattage, the better. Plus, the Seasonic PSU listed there is VERY VERY high quality, built BY Seasonic! Not to mention it's 80+ GOLD efficiency.
One last thing -coughs- I absolutely hate how the HAF series looks like, so that's a turn off right then and there
But in all honesty, you don't even need a 650w PSU, something like a 450w or 550w would suffice unless you're planning to add a beefier GPU in the future.
Antec Three Hundred Two Case - http://www.newegg.com/Product/Product.aspx?Item=N82E16811129180
Corsair CX430V2 - http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026&Tpk=cx430
They cost far less than both of those combo's you have selected and will be able to provide enough power to your rig even after your add-ons