Z gauge layouts can be produced with products from numerous companies. As for track there are three popular ones including Micro Trains, Rokuhan and Marklin. Marklin in my opinion is the most realistic, but unlike the other two you will need to add roadbed for realism. Cork roadbed is available from Itty Bitty Lines and most train stores that sell Z have this in stock. You can adjust the color of a cork roadbed with water base paint to match your prototype railroad. Cork roadbed is difficult to lay for curves, but cutting it lengthwise in two parts will allow it to easily manipulate for curves. Track maintenance is essential from time to time from cleaning to dust removal. If you own a Miele vacuum cleaner perhaps consider purchasing the accessory SMC20 Micro Set, it is perfect for removing dust from track and catenary. Use denatured alcohol for cleaning the track. A dirty track can often be the culprit when your loco is not running smoothly.