Make sure you play all the videos on "720" quality setting, (selectable between 360 480 and 720 on the lower right corner of the youtube window that pops up) or else you will get significantly lower quality audio.

Another thing, I did listen to 4-5 style samples and 2 of them were rip offs of actual songs (the "60's rock rising" or something is a copy of the House of the rising sun and the "Synth Pop Duo" sounds as close as possible to the group "Modern Talking" which were coincidentally a (German) synth pop duo with a disctinctive sound in the mid late 80's

the synth pop duo style http://www.youtube.com/watch?v=Ian3iGBeiqw&feature=player_embedded#!

modern talking http://www.youtube.com/watch?v=4kHl4FoK1Ys&ob=av2n

How many styles are like that?

update: I had my wife listen to the style through headphones without knowing what it was and I asked what she thought it was. The reply: "Sounds like Modern Talking"

[This message has been edited by trident (edited 09-17-2010).]