I need a DC power supply for my portable CD player.

I have a question that I thought that I'd ask here, what with all the pedal knowledge.

The specs are: 200 mA, 5-12 VDC, center pin positive 5.5 outer diameter barrel, 2.1 inner.

Question 1) Is it better to get something at the low end of the voltage range, the high, or the middle?

Question 2) The Radio Shack Dude told me that 300 mA would be fine, you just need at least 200 mA. Is this correct? If so, would it be better to get 200 mA, 300 mA, or higher or does it just not matter.

Thanks!