Should I live in this misery or have a bridge to fix my horrible buck teeth? (photos)

I have an over bite and my top front teeth stick out far too much! I'm already having treatment for a deep root canal in one of my four front teeth, I'm now thinking is it worth trying to get these teeth removed and some kind of replacement like a bridge or transplant? I've been so unhappy about these teeth for so long and I'm feeling worse as I get older (32 now) it's really effecting the way i live my life, can any one give me advice on how much a 4 unit bridge costs or transplant i live in the UK