Might be best to start out with something simpler just incase things don't work out, and you may need the extra money further down the line for more training etc. When you're just starting off I'd recommend a David Clarke headset. I had the H10-13.4 for a few years and it really is brilliant, it's not ANR but you don't really need that, it's just a nice bonus but certainly not essential. The David Clarkes are great value for money, practically indestructible and will do exactly what you require of them.
Further down the line maybe get an ANR, but in the early stages a David Clarke will do just perfect.
As for later down the line, I've an older model Bose aviation X ANR, great headset. Will be upgrading to the new model A20 in time.