Even since UE 11 Pro was announced at mid~late 2007, it had been crowned the title of best-custom-IEM, saw its designer Jerry Harvey left the company, Logitech's acquisition, and most important of all, being challenged by Westone and JH audio (which is Jerry's new company) for the title for being the best-of-the-best. If anything, UE has being fairly quiet about their new flagship - but now we finally get to know about it, the UE 18 Pro, featuring 6 drivers each side to answer back the challenger which is JH 13 Pro (and what's with all the number, really?). Oh, it is only US$1350 by the way. Read the spec here.
On a side news, UE also announced the UE 1 Pro at the same time. It is designed specific for musician who only want to use a side-monitor - either left or right side, but not both. UE squeezes both side of the dual drivers into just one side of the mold (and you get to choose which side you want it to be), which means there are 4 drivers, 2 of each channel with in one mold (but it is mono any way, since they are all in the same side). Price? US$450. Read the spec here.