The cheapest flight is not always the best flight, particularly if you are not sure of where you want to live. For a little more, or sometimes no more you can get an open jaw ticket, go into one city and out another, seeing things between the two. I get all of my flights from a fab agent at Travelmood -
kate.s@travelmood.com she can jig things around for you and come up with a really flexible route, usually around the same price as an 'ordinary' ticket.