I haven't tried a bunch of different transports, so for all I know they do sound different. But if they do sound different, I still wouldn't pay a bunch of money for a "high-quality" one - the ability to get bits from a CD off to another physical point (literally anywhere in the world) in bit-perfect form at CD-playback rates is a completely solved problem. If audio CD transports don't perform this function today then our response as consumers shouldn't be to buy very expensive versions of a transport. You can use your computer with it's $69 CD player to perform this, albeit somewhat clumsily at this point in time. But the manufacturers will come up with convergent products that provide this functionality cheaply. So, unless you have a transport that does some sort of filtering algorithm (ie bit-twiddling), a high-end transport has no technical reason for existing any longer, and if it does have some sort of filtering algorithm, buying an expensive transport is akin to buying the most expensive piece of software you've ever purchased.