When the VP180 came out the first thing I did was crunch some crude numbers looking at (a) the frequency range covered by each pair of drivers and (b) the separation between the drivers and the resulting lobing when moving sidewards.
My conclusion was that the driver placement (choosing which drivers to go far apart vs close together) was as close to ideal as I could figure out, and based on that I immediately ordered one. The only comb filtering I have noticed so far was with my original VP100, and that was only really noticeable on a single track (Return of the Giant Hogweed if you want to try it).
That said, I'm *really* glad the VP180 and VP160 did not come out at the same time, or I would probably still be trying to decide which one was better.
I got lucky and bought the VP180 before hearing about the VP160
