Rad question.
You can have your radiator recored at a reputable radiator repair shop, it sure beats paying $500 for a new one. As for the H20 pump, if it's not leaking or making noise I would not replace it. As for removal of the radiator, it has two hold downs on each side on top, remove bolts, drain coolant, remove hoses and lift right out. Very simple operation. Good luck.