Hi! Sorry for the late answer. I already have a Japanese 360 for its exclusives. Now I am in the process of getting an Euro system really cheap. If everything goes smoothly, I will have 3 consoles very soon.
I saw your post about getting a PAL Xbox 360 for European exclusives. I personally would get a Japanese system as many exclusives, and more achievements to be gained that way. Of course you will not understand the language, but most games have guides and translations for them to get all the possible achievements.