For the dishwasher, I would NOT get a bottom of the line at all. Too noisy, not enough features. My favorite brands are GE and Whirlpool. Although Bosch, Miele, etc are so-called premier brands, they come with a premier price, and I don't think they are worth the extra money. In the $600 range, you can do very well on a GE or WP.
For faucets, most of us here are conservative and lean towards the old standbys, Delta, Moen, distant 3rd Kohler. All of these have a decent selection of styles and finishes. The kitchen faucet is not so critical because it is relatively easy to replace if you get stuck with a lemon. If you fall in love with an unknown designer brand at the design center or on line ( we strongly recommend to NEVER buy a faucet on line) you will pay up in price, and find parts availability marginal.
For the pot filler, I absolutely "insist" you stick with a top of the line major brand.....Chicago, T&S, Fisher. They are not cheap, but TOO MANY BAD things if your pot filler goes south.
We get lots of questions here along the lines of " I am in the middle of this remodel and such and such doesn't fit" or something like that. You are absolutely spot on asking these question right up front. I STRONGLY urge you to get your designer involved right at the beginning ( even if the designer is YOU) and provide him, and any contractors, fabricators, installers with dimensional/installation details for all your product...cabinets, appliances, sink, faucets BEFORE any purchases are made or anyone starts cutting holes, etc. This extra effort will save you major headaches!