I'm a professional house cleaner and would rather scrub toilets than polish SS appliances. It is my least favorite thing to do. The granite is easy! Windex or a simple daily granite spray cleaner does the trick, but always use a high quailty micro-fiber cloth, damp. It will shine them up like nothing. If you have hard water you will have to be very aware of water spots around your sink. The calcium buildup happens very fast and it's a devil to remove. If you do get buildup, spray a very thick coating of Dow's Scrubbing Bubbles directly on the stain and let it sit for a good long time, then go back and wipe it up. It will take much of the stain out. Just be sure whoever installs your countertops seals them really well.
If your dishwasher front panel is SS, you will have to clean it every day otherwise you will have water streaks down the front and it will never look clean. Stovetops aren't that bad, be sure to remove the dials and clean each one, or you will have a buildup of cleaner and crumbs/grease under each dial. You have to clean the stove top with a degreaser first, I like 409, then polish with a SS cleaner. The SS cleaner alone won't cut through the everyday cooking grease, etc. If your fridge sticks out into the room at all and exposes the sides, don't forget to clean those as well, they seem to get just as covered with fingerprints.
There are lots of different SS cleaners on the market, from sprays to wipes. I like the wipes for the dishwasher, somehow the sprays just don't seem to cut through the stains. For all other appliances, I use a spray. It doesn't matter much where you get them or who makes them, they are all pretty much the same. I use a micro-fiber cloth to polish the SS as well, it does a great job of doing a very even polish job. Just remember to polish with the grain, it looks better that way.
Have fun with your new kitchen, what a treat!