It's 3 bedroom and the bath with tub is in the hallway that joins the 2 secondary bathrooms. The tub/shower decision is for the master which is attached to master bedroom. It's still a small 1980s bathroom so have to be space efficient. Cost wise, just throwing a new fitter with tub in there is probably cheapest. If we do shower it would be a pre-made pan then some fancy tilework for walls.
Thinking something with a partial wall like these:
http://www.johnbridge.com/vbulletin/attachment.php?attachmentid=73516&d=1271258977
http://media-cache-ak0.pinimg.com/236x/00/a3/7d/00a37d499bc107dbffca53165f990c35.jpg
%5Bimg%5Dhttp%3A//i.imgur.com/pNMbfow.jpg[/img]