Some comparisons for Leo or anyone else who is interested. Thought I'd throw the TE-05's into the mix with the Heaven V and Cardas because the Cardas sticks out like a sore thumb out of the three.
Bass: Cardas is really thick. A mix of sub-bass and mid-bass. Doesn't sound as controlled as the other two. TE-05 has more sub-bass over the V's. V's have more mid-bass. Both the V and 05 have nice controlled bass, Cardas has control but not like the other two. I definitely prefer the TE-05 and V in the bass department. Can't pick which one I like more but the TE-05 might get the nod in bass.
Vocals: All three have nice vocals. Can't really tell which one has is the most forward since all three are not recessed in any way. Bass does protrude into the Cardas which gives more heft to the voices and adds a nice element to male vocals. V's are in between the two and TE-05's are on the airer side which gives female vocals star treatment. V's do well with both and I would give the nod to the V's for vocals followed by the TE-05 a close second. Cardas still is strong on the vocals though.
Treble: Cardas sounds more laid back than the other two but is just as detailed. V's and TE-05's have really nice sparkly treble. Can't tell which one extends more or less. The TE-05's sound slightly thinner in treble but I don't hear this as being bad. Both portray treble amongst the best I've heard. Very detailed without a hint of harshness but the TE-05's get closer to that amount.
All three do a great job of surrounding the music all around you. The TE-05's seem bigger due to that really airy treble and is the least thick sounding of the three. The V's can pick out all notes the best since it's tuned quite equally all around. All three are really good in this department.
My preferences are the V's and TE-05's of the three at this point. The Cardas is still a keeper for me but will be used sparingly because of the thickness of the sound. The bass of the TE-05's are absolutely amazing because it hits the low notes without any bleed and is strong. V's are tight and has that mid-bass bump but not offending mid-bass. Cardas just has big bass to my ears compared to the other two.
Thanks Danny for the in depth impressions. Very informative and will stick with the V for now. Fostex or Cardas will have to wait though.