Good audio is often as expensive as good video.

You really need to use XLR mics with XLR connections.

You would connect these to the camera via a Beachtek DXA-SLR, set to stereo (this basically gives you two seperate audio channels so you can mix the mic levels individually.

The Beachtek has a headphone socket so you can monitor your inputs, and if you can monitor audio on playback direct from the camera.

The Beachteck also provides phantom power to professional mics, and gives you level controls, level switching and all the tools you are used to if you've used a pro camcorder.

THe major gripe with the 7D is the lack of manual audio levels, the beachtek provides an automatic gain control on the LEFT or A1 channel, which is outwith audible range and can be easily filtered in post.

You want two rifle mics, I use the Sennheiser K6/ME66 combo, considered budget compared to the mkh416 and 816's used on film sets, but still pricey. Particularly when you add the suspension mount and rycote windjammer.

But these are the tools for the job!

If you are on a serious budget then look at a beachtek DXA-5Da instead, slightly lower specification, and use the decent RODE NTG-2 mics instead, big saving and still very good quality, and self powered (from internal AA)

If you are booming then you are taking your audio seriously, this requires a bit of spend I'm afraid.

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