For ambience, I would probably check out the Eventide Pitch factor and Space pedals, but I haven't actually played with them.
well of course, but then again Eventide beats everyone in the sound quality department. better A to D converters among other things. Let's see, one pitch factor $499, one Space, TBD, not yet out, but for the sake of argument lets say another $499, thats $1000 of signal processing right there. still interested Gareth? :-) if you can afford that firepower go for it as you won't be disappointed. I personally want a time factor and a Space which I saw demoed at NAMM, and was one of three things that really made my Shakespeare curl ( to quote XTC) The other two were the pigtronix Philosopher King which I've raved about before, and the new Moog lap steel which I'm hoping to check out more if I get to the factory in March.