When a floor tom is added to make a four-piece kit, the floor tom is usually 14" for jazz, and 16" otherwise. This configuration is usually common in jazz, classic rock and rock and roll. Notable users include Ringo Starr in The Beatles, Mitch Mitchell in the Jimi Hendrix Experience, and John Barbata in the Turtles. For jazz, which normally emphasizes the use of ride cymbal, the lack of second hanging tom in a four-piece kit allows the cymbal to be positioned closer to the drummer, making them easier to be struck.
Since there are so many digital pianos worthy of your attention in this catalog, you may want to narrow down your choices using some of the search options on the sidebar. For example, if you select stage digital pianos under the category section, you'll be presented with all the digital pianos that were made for the stage. Once here you have the opportunity to drill down even further and can search by topics like number of keys, MIDI/USB Connections or by whether or not the digital piano has built-in speakers.