Well if you're really going to spend $200 dollars on a fore-end you may as well go with one of the better free-floats, JP Enterprises makes a modular handgaurd that is pretty kick-*** and you can have rails at any of the traditional 12, 6, 9, and 3 o'clock postions as well as the other 4 off-set positions.
Their philosophy of having "just enough rails" to save space and weight is a really good idea, not to mention they sell pretty decent heat sinks that fits under most of their fore-ends for cooling during rapid fire.
I have this on my list for my 6.8mm Spc M4 build list and have heard nothing but good things about them.
Here's their home page---> JP Rifles
They're going for about $170 on Midwayusa.com
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