The bath is actually sitting in the garage at the moment - bathroom being done in February! We are having taps which come out of the wall but the wall won't be built out to do this (we've had this in a previous house and they didn't build the wall out there), but you could also have freestanding taps at one end of the bath, or the other option is to use the filler bit in the bath as the part where water comes out (eg I think it's an overflow but the bath can also fill from there too). I hadn't heard of that before but the bathstore people talked me through it, we didn't go for it though.
I second Polter. Have a sit in it before you buy. Biggest is not always best . I have v tall DH, so we went for longest bath we could get. I find it v uncomfy because I have to sort of grip the bottom with my feet to stop sliding down. With us, a bath the right length for me would leave him with knees round his ears, but with only 4" between you, you should be able to find one that fits you both.