hey mate,
a few people on this forum including myself have atomik blitz's, and the verdict is that they are a great bike for the price. i really like the look of the xz250r though, it looks like a really well put together bike. the only issue i have is that no one else on this forum has one (correct me if im wrong) so their still an untested product, especially compared to the blitz. if your mechanically minded i recommend getting the xz250r and making a detailed review for us