is the groove DJ a complete arranger with a sampler? I might be interested in buying such a desktop unit in the future, it would be easy to connect it to an high quality,cheap master keyboard

but the Liontracs website is far from informative...no online manuals, no clear specs beside the main computer parts

any alternatives to the Groove DJ from other companies?
I had a look at the OpenLabs stuff but they don't seem arrangers to me, they seem more like optimized PC's with XP into a keyboard, which is not what I want.