Monster is as expensive as the store you buy it from. I got my Monster speaker wire on eBay for about 1/5th what you paid for your stuff. Stores gouge you for sure when you buy off the floor.
Easily the best banana plugs I have ever used came with my Rotel amplifier as it includes a plastic shield and two recessed screws to hold the wire in place. The speaker wire is completely covered and can't be pulled out of the banana plug. Also, the plug doesn't leave exposed metal/wire that could lead to a short.
Here's a pic of them, but I have a really hard time finding them in the states... and I don't need any more than I already have.