yes but a taxi takes twice as long as walkin, the barbizon is across the central station, that part station-dam is the busiest part of amsterdam, a taxi means sitting in it while he avoids drunken tourists
http://www.parkplaza.com/webExtra.do?hotelCode=NETAMST
this is across the station too, never used it but it doesnt look bad, make sure you book through bookings or so 50-75% off is normal dont use the hotelsite
dont forget these are all old buildings small rooms think paris not phx
if you look for hotels look for central station-dam-prins hendrikkade