I'm using an Mbox and PowerMac to record ambient sound backgrounds for film. I've been using a pair of Schoeps MK-2 omnis but they are not available for this project. I'm looking for a cheap alternative. A friend suggested Studio Projects C4s in with omni capsule. The recordings will be done outside (in China and Hawaii) and in large public buildings. This will all be stereo. I'm generally looking for a light airy sound. Any experience with the C4 or do you have alternative suggestions?