We moved this year, on our first viewing, as soon as I saw the kitchen I new I wanted the house before I saw the rest. It runs right across the back with bifold doors on to the garden a lot of high gloss white units. Not a problem at all to keep clean, although when the sun floods in, it can highlight any areas that may have somehow been overlooked. As others have stated here, they really aren't a problem to keep clean I use a Flash kitchen spray that does a pretty good job, but I'm looking here at others suggestions too, so may try those out.
Hope you get the kitchen of your dreams OP.