The only additional cable you might need is one SATA data cable each for the drives being recycled from the laptop. Check the data page for that motherboard and see if included in the box is a SATA cable or two. Some motherboards include, some do not.
Most (but not all) coolers come with pre-applied thermal paste. Again, check the product page details. You may not need to buy any extra paste in that case. Thermal paste is very non reactive to just about anything. Still, don't eat it or rub it in your eyes.
Are you buying the sound card because you are doing some hardcore sound work? Otherwise the motherboard will have sound built in, although it is just general consumer grade sound.
650W is strictly speaking the minimum you need here. If you get a "gold" or "platinum" rated model then 650 is fine. If you ever want to upgrade for example the graphics card then a new, higher rated, PSU will probably be needed.
Otherwise you're all set with that list.
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