Originally Posted by Bob-Stormer
You might be a little off on your dates... 
IB3600, April 2004, coming up on 3 years.
IB3800, March, 2005
IB4200, December, 2005 (nearly a year now)
well 4200 hasnt been widely available since around march 06, since then there has been the UHV and the WC versions.