In my view, it depends entirely on how much power you put into them. With the Pico Power, the HVI arguably has too much bass but this is certainly not the case with the Classic headphone out. (Do I have to say IMHO? Take it as a given...)
(Right now I am thinking that the Quickstep is just right but truth is: Pico Power + Heaven VI is sweet, strong bass not withstanding.)
Not sure how I feel about EQ, Shane. I do it often initially with headphones but I always end up abandoning it. I prefer component synergy as a means to arrive at a desired sound signature.
I personally think a part of it is that very good dynamics on the Heaven V allow the bass to be perceived as being more powerful. It has a certain quality uncharacteristic of most BAs I've heard, not quantity so much as style of delivery.
Someone needs to post up some music that is excellent with the 160X (not any of the Heaven models) before this thread derails itself.
Wow that sounded great on my laptop speakers. Maybe they are PF-like not having extension on either end.
I imagine this would sound sublime on the real things rather than my reasonable facsimile.
Don't forget it's a limited to one unit. Obviously people on HF have better taste in music than I ever gave them credit for as my Limited-to-One Van Halen Edition Heaven S has been up for sale for 15 months (May 2012) and there's been virtually no interest in this collectors' item. What were FAD thinking, I wonder, when they created such an "abomination"? Been wondering lately whether this unique pair would sell if I lowered the price to £5 (including express FedEx shipping anywhere in the world & PayPal fees).