I'd have another Paterdale Terrier , the family one passed away a week ago at the ripe old age of nearly 16 , perfect dog with people ! Very protective too, even when he was struggling to walk he shot after next door;'s 2 jack russells who went near my 2year old nephew. They don't back down from anything - doboerman's alsations you name it if it went near us it'd have a go to protect you.
I now have a pug that i'm happy with as they dont require much exercise so when you work full time it's not fussed , lays around and sleeps unless theres food about, although they are pretty thick dogs so training them to do the basic stuff like sit and down has taken me more than 6months!