This is a pretty tough one for me...
But if I had to choose, I'd choose nagureo.
Sure, wac's songs may have a sharper impact on me, but I find that I get easily tired of a lot of his songs....
Nagureo on the other hand, is just different in many ways from the modern IIDX composers (Simply because he's the oldest one of them), so his style offers quite a variety of styles of songs...
