what xbuy?
 

Is wise wait for the new Xbox 2 (v1.1) or buy the "old" Xbox?

It doesn't really matter. The old xbox is good because there are so many different modchips you can get already. The new version doesn't have any, but one should be released in a couple weeks.

The modchips of the new version of xbox requires you to flash it yourself, but there are modchips of the old version have bios installed on them already.