Choose entirely based on what focal lengths you plan to use, but I disagree with comments about the 18-55mm IS being bad. It's a great lens, just slow. At the wide end it's just as good as the 17-55mm f2.8 IS (except 1/2 stop slower, but smaller and with arguably better IS) and at the long end it's about as good at f5.6, but unfortunately it's too slow to get shallow focus and it does have some CA. And I consider the 17-55mm f2.8 IS to be one of Canon's best zooms. The 18-55mm IS beats the pants off the 17-40mm f4 L! Trust me, I have owned all these lenses...it covers boring focal lengths and is too slow to offer shallow focus, but the new kit lens is very, very good and an enormous step up from the original 18-55mm (the one lacking IS).
The 55-250mm IS is ok, too. But switching lenses can be a pain, so I might go with the 18-135mm purely for convenience, but then you get a jack of all trades camera (no better, just bigger, than a point and shoot for most purposes).
The 85mm f1.8 would be nice for portraits. I find the 50mm f1.8 too short, but for $100 it is a great lens.