I don't see anywhere where he's asked for the exchange rate?
But nonetheless - keep in mind that if you pay with paypal, they house their own exchange rate, so it'll be a dollar or two different!
Back on topic, I think you're better off buying the plain plastics and having the stickers either custom printed, or find some nice looking ones elsewhere!
I've had a look on ebay, and the only ones I can see are either being used on every bike in the forums, or look crappy!
The other positive to doing it this way is that you'll get to apply the graphics yourself.
I've never purchased pre-applied graphic kits, but I'm almost certain that being mass-produced, they won't have been applied with patience, and will certainly have folds and what-not in them!
Purchase your graphics and plastics separately, and you'll have the fun of applying the graphics yourself, and the reward and satisfaction of having done a nice job
As for the colour of the plastics, personally I like black - it has a real sleek look to it!
That's just how I'm planning on doing it, anyway.. I guess at the end of the day, if you see something you like, and it makes you happy, then go for it!
Cheers,
br0die