I would just like to add, for comparison sake, that I found the forte entirely too dark. Returned it after a week. Believe me, I tried to get used to it,i just couldn't. I'm finding that 99% of aurisonics products are just tuned very dark, barring the rockets, Eva, and 1plus.
I think you just have to be in the market for that. With the forte, I was not expecting that. There weren't much info on it when I purchased it, so it was kind of a blind buy. I just assumed it would be a really nice, complete sounding earphone, but to me there was hardly no top end at all. Actually, the way jackpot77 described the 1.5 is exactly how I heard the forte and for $400, I don't think so.
That's a fair point - everyone hears things differently, and if you aren't in the market for the main Aurisonics "house sound" of great bass and mids and a darker treble presence, then I'd definitely suggest listening or reading as many comparisons you can prior to taking the plunge. For the record, the 2.5 also has good treble presence (not too far from the 1Plus) but that often gets overlooked due to the massive bass it is known for.