cam duration

as mentioned earlier...something that has a smooth idle, doesn't load up and gets fair mileage (read short duration hi lift)
.. emphasis on lo rpm torque,don't want a big hp number,no racing, street car

Well I read that. But I don't see why you think a 230/236 cam won't do any of that? I run comp XE274H (230/236, 488/491) and it idles great. I idle at 1000 for best vacuum with power brakes/steering. Idle is not rough by any means (to me at least, it has a noticeable lope to it). No loading up. Pulls HARD right off idle. If I mash that pedal she just burns tires and GOES. The thing runs like a raped ape. I'm running 10:1 on iron heads with that cam. I could run 91, but I stick to 94 so I can run some more initial timing and really put a tune on it. It's a great cam.

Only thing I can't speak to is mileage. I bought a scamp with a 400 horse 340. Not a prius.