You can choose any mobo from these. There is no performance differences. You will get all z87 chipset mobos almost same performance. The difference will be minor which can't notice easily. You will get more features as well as you increase ur budget for mobo not much performance. So you can choose as u features need.
No need to worry.
I hope it helps.
VRM is a voltage regulator module ,
sometimes called PPM (processor
power module), is a buck converter
that provides a microprocessor the
appropriate supply voltage, converting
+5 V or +12 V to a much lower voltage
required by the CPU, allowing
processors with different supply
voltage to be mounted on the same