$600 seems to be the new entry fee for high quality interfaces - Forte, Audient, Babyface, Avid. I guess the generation that bought $200 interfaces is now ready to step up - or the manufacturers hope so. I'm wondering how much better they can be? The mid-line stuff that is coming out like preamps put a premium on transformers as well as better components - but transformers are the expensive bits. Still, I suppose the $600 is better, even if they don't include transformers like a Burl, etc.
I'm glad I'm happy w/ my TC, otherwise I'd be tempted ...