Which remote preamp in front of audio inputs for dSLR video? Everyone: I need advice on a remote 2-4 channel preamp for documentary sound for dSLR video (EOS 5D mark II, EOS 7D). I'd like to do it cheap, but still very high S/N and sound quality. I expect to use an AKG C451EB-shotgun capsule combination (or some other shotgun recommended here if there are compelling reasons to NOT use CK8 or CK9) and a lavalier mic, or two lav mics with it. The ART Dual Pre USB looks good, though I'm a little concerned about having just two channels. Maybe it doesn't matter, but I'd like as much control as possible, and maybe a third channel for a room ambience mic. Any suggestions? Thanks!