The sanza players are actually more accurate than the "audiophile" players. The HM (Hifiman) line is misnamed as it is actually not particularly transparent.
Just because a product calls itself "hi-fi" doesn't make it so.
The 602 is $440 NOT $599. The 601 is $260. I question listing the iMod #2 unless the ranking is by price solely. Most iMods are likely below the Sflo2 or equal to it. Some exceed it and whether those would exceed the QA350 is another matter. The Gumstick and Clip+ should be listed. The QA350 also does not need an amp. Only the iMod 'needs' an amp.
Excellent, very helpful comments, I'll make some adjustments to my list accordingly. The iMod I'm referring to is the one sold by ALO made by Vinnie.
I actually haven't been able to find a place to buy a 602, thanks for the price correction.