The link that Adam gave you is excellent, no doubt about it.
These cables (XLR) are super affordable and are also great, go for it.
I highly recommend Monoprice.com for your cable needs.
There is also Blue Jeans Cable (that you just mentioned), another great place with great cables at great prices.
* Here:
http://www.bluejeanscable.com/store/balancedaudio/index.htm
Either place is a great place to shop for cables.
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And just forget about the guy that was trying to sell you a power cable for only $250.
It's pure bull with grease on top, absolute non-sense.
Bob