bathtub recommendations americast, bootzcast, acrylic, or cast iron

Hi : I am doing a bathroom reno on my 1959 split level...contemplating tubs...are the americast and bootzcast that bad??? I have read a few negative remarks on this site and other sites...and of the two which one is better americast or bootzcast ???obviously I am trying to avoid humping the cast iron up two flights of stairs...or how about an acrylic tub??? any recommendations on manufacurers???positve or negative......or should I round up a couple of guys and "set it and forget it" with the cast iron????
Thanks for the input