I understand that you dont want to accumilate any further expense in your analog setup, but I would swap out your DL-110. That cart is far from neutral. I believe some HOMM by AT will give you more musical bliss than what you have. Not a big fan of Grado either so if your taste is anything like mine, then whatever carts you have at this moment will not do.

Hey, as soon as you wanna get rid of your LP let me know how much you want for your Zerostat.