Just to add a bit of perspective to the discussion--I have a 414 XLS
, and while I do very much like the mic, I have had problems with it that would make me hesitate to buy another. It turns out that the pattern selector on the front panel has a plastic backing onto which a thin layer of metal foil or paint is applied to carry the electrical connection. This layer on mine wore thin after only 18 months or so, and I started getting a serious low frequency hum/ground problem that made it unusable. AKG wanted $300 to fix their design flaw; luckily my gear guy in Chicago touched it up it for $60--hopefully it will hold up. I can't say that I have confidence in it, though.
I'm not sure about the build quality of the AT, but my AKG is kinda weak in that regard (sounds really nice, though).