I currently use a Kurzweil K1200 - yes, old and outdated compared to current keyboards, but still definitely functional for my purposes. Plus you CANNOT beat the Electric Piano sounds in that thing!
It strikes me that the equipment you have can serve as either a limitation or an inspiration, depending on the circumstances and your attitude. Bad, limited equipment can indeed keep you from making music - but older equipment that is still functional can still be usable. The catch is that it often takes longer, or mroe effort - which may in turn produce better music.
Musicians have long struggled with their equipment. How many pianos did Mozart have custom ordered? Beethoven had a special piano created with heavier strings that sounded louder, to compensate for his slowly growing deafness.
Good equipment is necessary for a performing musician to work. Good equipment alos costs $ - it's the old "you get what you pay for". I paid more for my Kurzweil than some other competing keyboards, but the thing has lasted well over a decade. It's amazing what having a metal body will do for longevity! (plus I take real good care of it).
