Forgive any assumptions but you are posting in the Drums and Percussion forum so here goes.
Is there a compelling reason why you've chosen this particular piece of gear?
I took a look at the Digitone Keys. The posted price in Swedish Krona equals about $1,400 ++ in US dollars.
There are LOTS of options in that range.
One would be a Roland Handsonic, that will have a huge and authentic range of sounds, from jazz snare with brushes to thunder thumping EDM. There will be libraries of world percussion sounds, crazy effects, kits that sound like they were recorded at Sun Studios in the 50's, etc. Full MIDI implementation so you could feed it MIDI files from a pad or a laptop and be within budget if you shop carefully. With a hi-hat and kick pedal you'd also have a complete and compact "drum kit" for live studio work and gigging. Then you could create your own MIDI loops by playing them yourself and choosing the sounds you want from what is available - which is EVERYTHING pretty much.
That is just one of many options. A laptop and Novation LaunchPad would get you there too and provide a nearly infinite set of sound capabilities. Superior Drummer, EZ Drummer, NI Studio Drummer etc. all await.
Or you could just get a library of audio format drum loops and call it good.
For that matter, the Yamaha DD-65 is better than people think it is (you have to hook it up to some good speakers!!!!) and you should be able to find one for well under $200, which leaves plenty of budget for other goodies.