I don't own a Linnstrument, but I know a couple people who have them and they all seem pretty impressed with it. If you want something less expensive, you migh

I don't own a Linnstrument, but I know a couple people who have them and they all seem pretty impressed with it. If you want something less expensive, you might take a look at the Roli Lightpad Block. It's kind of like a miniature Linnstrument. In 5x5 grid mode you get 2 octaves. I find it more fun and usable than the Seaboard Block. I'm a little hesitant to recommend it though, because Roli is awfully controlling. To configure the device you have to use their software (which runs on Mac and Windows only), and it won't talk to the device unless it's registered to you. So if, like myself, you bought it second hand, you have to file a support ticket and have it de-registered from the previous owner before you can register it to yourself and actually use it. (To their credit, the process was pretty quick.) The Linnstrument is the complete opposite -- the device firmware is Apache 2.0 and available on github.