CPU Core Voltage 1.47-8V --- This line is changing between 1.47 and 1.48V
Thats perfectly normal.

Enermax 350 Watt PSU
£35
Thats the one i would go for. Do NOT go into the shop and see a 600w psu for 30 quid and buy it. That site only has q-tecs,generic psus and 2 enermaxes. The 350w one should provide ample power with it being much more stable than anything else there.