I would go to a very reputable and knowledgeable music store in your area where they know their stuff and aren't intertested in just making a sale. Get a professional opinion and do the same thing two more times at least. THEN make a decision after trying the keyboards out. Know what you want to do first with it (effects, sounds, interfaces, etc) and go in armed. Get something good the first time around that suits your needs now, and can be expanded upon in the future...