JS, this one slipped by me. As Bruce says, the tile job will only be as good as the laminate bond, but that may be quite good, you'll have to judge. If you go this way it requires abrading the laminate, and use of expoxy thin-set (very expensive). Adding additional substrate material over the laminte is a good option, but here I have to disagree with Bruce. Plywood is never a good substrate for tile, and on a counter where water is prevelent, it is particularly bad unless you want to cover it with a waterproofing membrane. Two reasonalbe options are: 1, leave the laminate as a waterproofing membrane and cover wiith 1/4" cement bd. or 2, leave or remove the laminate and cover with 1/4" Dens-shield (which has an integral waterproofing membrane. In either of these options latex modified thin-set is fine (much cheaper than epoxy).