Wow, I am wondering how much better portable sound can go regarding sound quality, or frankly how much it really needs to. Twice the cost of an AK120? that must be some improvement! Like the difference between a analogue cassette and and a CD to command that sort of price. Well for me anyway. The trouble is that we have reached the point where sound quality need not go any further as we can now surpass our parameters of hearing with technology. We only have to look at these forums to see how subjective is our experience.
Well the $780-ish Sony NW-ZX1 is quite an improvement over the AK120... :)