Taking things at face value (yeah, right :)), good reasons to buy this bike are that the fork is not only white, it is uniquely superb. The frame is reputed to also be very good – a lot of praise on here for the RZ, so if it felt like a good fit in the LBS you’d have a great bike. Cannondale always offered a lifetime warranty on MTB frames but I am not sure if that is still the case. If it is, then you’ve got a high end MTB frame for life.
If those reasons don’t really resonate with you then it’s not a good choice. It would be too much money to pay if you’re not that arsed about riding the lefty (even if it is white) / don’t think the frame is anything special / and it’s not backed up with a great warranty.