Personally, I enjoy the flavor of Swiss water decaf more than others (and by reasoning of the "Dorito effect," that flavor may have something nontrivial to do with the nutrients left in it; it also happens to not use additional solvents).

That said, a lot of the risky solvents used in the usual methods of making decaf are no longer commercially used these days, so I don't think there's a serious health risk in drinking any ol' decaf you want.