[villagetinker]

Regarding new sink, check the location of your vent in the plumbing as well as the depth of the sink. Changing either of these can cause problems with the plumbing, resulting in the need for a plumber. If you have a "drop-in sink" and can stick with the same type, these can be fairly easy to install, a handy man could possible do this. If you have a under hung sink, I would have a professional do the install, as you could damage the countertop with the mounting screws. The depth of the new sink can interfere with the mounting of the garbage disposal.

I tend to agree with previous comment on the driveway, you might be able to find the same SIZE pavers, and carefully remove the damaged ones. You might be able to place random replacement pavers to create and great look without a pattern. In any case plan on future cracking and similar replacements, so get extra pavers.