Got the deltas last night. Quick listening so far I enjoy the gunmetal more than the gold. I do see why you guys prefer the bass on the gold, but it is a bit to bass light to my ears for a neutral spectrum. The gunmetal sound more neutral to me, though I agree the bass can approach boomy at times, but I don't think I have heard boomy/bleeding bass yet. Timbre and tone seems pretty good so my ears, better than the Havis anyway. Only concern with the sound so far is the top end which can get harsh at times, especially with poorly recorded music. For example, Smashing Pumpkins Mellon Collie and the Infinite Sadness, the brightness levels of this recording pretty much blend together at times into a somewhat piercing result. Anyone else experience this?
To contrast, The Samurai of Prog - 'The Imperial Hotel' sounds really nice on the deltas. No harsh top end and the tone/timbre seem spot on to me. The Havis (which is typically compared to the deltas) I always found has a funny (maybe metallic) sound to cymbals and drums in this recording - I think the deltas make stuff sound right!
So far I am enjoying the deltas and hoping maybe some burn in will smooth out the top end a bit.
Edited to add more comparisons.