Ok im goin to be buying 2 100 foot roles of film; a faster and a slower film. i was thinkin a 100 and a 400 speed. so for the 100ish speed film i was thinkin eather plus-x or 100 speed t-max. for the 400 speed film i want somthing that can be push processed.i have been using tri-x for a while and its ok. what do u think would be a good stuff to get? also all has to be black and white film.