Hello Andreas,
Alistair is right in saying that Gravis is just an Apple "Professional" Reseller. I have had some experience with Gravis in the past and I must say I was not impressed
by their service either.
On the other hand I can only say positive things about the official Apple stores. A few years ago I bought an iPod mini in the Apple Store in New York when the mini was not yet available in Europe. Unfortunately I had a problem with the unit and the Apple Store in Zürich went to great lengths to get the issue sorted. And I did not have to pay a single buck. So a big
for the Apple Store.
