@synkrotron.. you know this is not just a controller right?.. that is like saying Sonar is a VST host. :)
@jwh : those were prices on guitarcenter.com
Maschine is currently on sale for ~$200 discount pending the arrival of a new controller with colored pads (a disco i dont need) but all else is the same. a quick post in the NI forums may locate a cheap source in the UK or Eur for you... the price will bounce back to $599 once old stock has gone i suspect.
As Laney points out, as an add on to Sonar, Mikro is certainly adequate, for standalone beatmaking, full size is betterer...the Mikro has the basics and of course all the content too, but the larger unit is easier to use and also has the 8 knobs.. particularly handy for fx adjustments, kit/sample selection and vst control..