For me, Delhi 6 is the Dil Se of this era. Songs like Rehna Tu, Dil Gira Dafatan & Masakali are creatively as innovative and pathbreaking as Dil Se Re, Chaiyya Chaiyya & Jiya Jale were those days. Sonically speaking, perhaps there's not as much scope for innovation as there was during Dil Se. But let us give credit where it is due. Delhi 6 is absolutely stunning. A masterpiece of this era.
Regards, Sunil