I am in the same boat Nate, I tried the Scarpa Phantom Lite size 47, but had some heel slippage. Pissed me off cause I got them for $300 and didn't want to return them, but had to.
Have you checked out Kayland? The Super Ice and M11 got good reviews, but they are hard to find. I saw some Lowa Cristallo size 13 at Seattle REI garage bin for $175 last time I was down there, but hesitated to buy cause they were heavier than other models.
There have been some recent threads comparing the boots you are interested in Trango vs Nepal.