Good Buffer/Preamp circuit for electret mic

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Hi,
I need to mic up some fiddles but I dont want to spend heaps on real instrument mics. I would like to build some mics using cheap electret inserts. I have tested the quality and it seems pretty good, but I read somewhere that they need a preamp for longer cables to reduce the impedance or something to prevent noise.
Does anyone know of a good discrete circuit to use that uses very few transistors? There's one that looks good on the net but uses heaps of transistors. What if I just put a simple class A amp like this?
An externally hosted image should be here but it was not working when we last tested it.

I might use phantom power, and don't need a balanced output.
 
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