I've had an L322 since August of 2002, and am on my 5th L322 (after a 2 year hiatus before this most recent one). I thought the L405 would grow on me over time, but it never has. The L405 drives slightly better and feels quicker on its feet, but overall it's not a huge leap (and this was after a month of having an L405 to drive around). So I ended up getting a 2012 AB Ultimate, and couldn't be happier. However, I also have a couple of RRCs, so not sure what that says.
I recently walked back to my L322 and a L405 had parked up next to it, and knew I had made the right decision.