Hi Glen,
I have no problem with the drum sounds on the KN7000 - I find that most of them are realistic and perfectly acceptable. Some are a little low in volume - such as the Triangle - but this can be corrected by using the User Kit.
The only problem as far as the drums are concerned, is creating realistic drum parts in a 'from scratch' style in Composer. Trying to create anything other than a fairly basic drum part, using the keys, is a little difficult to say the least
This can be overcome to a certain extent by creating the drum part in 'Step Time' but the result doesn't always sound natural. I don't regard this as a shortcoming of the KN7000 - it would be exactly the same on any arranger keyboard.....
The solution I often use is to connect a small Yamaha Midi drum kit to the KN7000 Midi Input. The device comprises 6 programmable pads and 'Bass Drum' and 'Hi-Hat' pedal switches, which I can play like an acoustic kit, using sticks and feet.
I don't use the actual sounds from the Midi kit - I just use it to trigger the KN7000's selected drum kits.
It's a long time since I heard another make of keyboard, so I can't make any meaningful comment about KN7000 versus Tyros or KN7000 versus any other keyboard.
The fact that the KN7000 and some earlier KN series, have Two drum tracks, allows creation of quite complex drum parts, since you could have for example a 'Standard Kit' assigned to DR1 and an 'Orchestral Kit' assigned to DR2.
In short, I'm very happy with the KN7000 drum sounds