IMHO, Sony hybrids brings out a nice balance between bass, mids and highs. It's one of my favorite tips for most of my IEM's. Very soft and comfortable. It's works great on my VSD1S.
+1 on the Sony hybrids. I use them on most of my iem's that they fit.
Edit: I'm particularly found of the kind stuffed with foam. Not easy to find though.