Ignorance is bliss. The N900 sounds great unless you are used to a device with better highs. Cymbal decay is an example that shows the N900 needs a hardware EQ to boost the highs up. N900 is still good though and blows the Archos 5 away and sounds better and more volume than Droid.

EQ should make the N900 audio nirvana.

Then again, using stock buds will sound bad regardless.