Yes, which cans have you chosen? With my high-z Sennheisers (300Ohms) the receiver outputs I have used have been only minimally effective in bringing out the dynamics of the music. With lower-z cans this has not been a problem. I have a couple of head-amps for iPod/PCDP use and for listening through the receiver. You can go from $20 BYO/DIY amps to $$thousands$$ as far as the headamps go.
Headroom makes some good amps over a wide price range. I think the real value is in their mid and low-midrange models.
