I just ordered two pairs of ER-20's for my wife and I. We'll see how these go and maybe work our way up to the customs.
I recommend the earplugs as well.
I suffer from hearing loss as well as tinnitus. Wear earplugs whenever you are in loud situations, including machine work, grass mowing, etc. The problem with hearing is that things sneak up on you. You think you're OK, but that is only because your mind is compensating for your hearing loss. If you don't watch out you will find yourself with loss or tinnitus. The first sign of loss is when you have difficulty communicating with people in crowded rooms, like bars, restaurants, or conferences.
If you can afford it ($50 or so), get a hearing test done by an audiologist (a PhD in audiology, not just a technologist selling hearing aids).
Please save your ears before it is too late!
Richard