Well if you've tried the Soul and you liked it, then that seems like a safe bet for your own personal happiness. From what I've heard the Soul headphones are one of the best choices out of the rapper headphone offerings, but still fairly easy to beat for sound alone. I've never used them, though. I've also heard that the monster DNAs aren't too shabby, and much better than beats, but I have no experience with them.
As for Zoro vs the Zoro HD, it seems like a no-brainer for you to go with the regular version since they have such a good recommendation from Tyl, and you prefer on ear (which they are). I have no idea if the HDs are better, if at all, all I know is that they're circumaural.
Another one you might possibly like is the Onkyo ES-FC300. That's the headphone I'm strongly looking at buying for my portable uses. Not sure if that styling does it for you, but I love the look of it, it's got removable cables, good build and good sound apparently.
And if you like on ears, you
really should be at least considering the V-Moda M80. I didn't find it comfortable, but a lot of people do. They'll definitely satisfy your balance of sound quality, style and bass quantity. You can read my review here:
http://www.head-fi.org/products/v-moda-crossfade-m-80/reviews/8446