I was experimenting with tips on the SB .... My favorites are the plain silicone ones from FAD (medium size). Compared to everything else, it brings the bass out the best....
This might be of interest to you as well James & Shigzeo... Might be worth trying to bring out the bass with these tips rather than through EQ...
Here's the link for the V-Moda tips:
I must say though, that although these are better than FAD's own tips, I'm not completely satisfied with them... so the search goes on for tips that can truly bring out all that the SB has to offer.