(First thing first, I am assuming you you have an F-marked FSB or proper milspec height front sight. If you have A2 height, reverse the following or better yet, buy a 0.04" taller front sight post to bring you up to flat top height.)
I'm also a fan of the Matech but if you want a carry handle, don't worry about going with the Spikes. Double check me but I'm almost 100% certain they use the standard milspec height FSB for their flat tops (F marked FSB) so the carry handles they sell will be the proper height for the front sight. Most carry handles aren't marked with the rifle makers name, just the forge mark, like Cardinal, Cerro Forge, Anchor Harvey, etc. They are sold to Colt, BCM, Spikes, etc. in proper milspec height and construction so it doesn't matter if you buy BCM or Colt or Spikes.
Now where you can get into trouble is that DPMS, Bushmaster, ArmaLite and a few others use the shorter FSB proper for the A2 integrated carry handle on their A4/flat tops. So their removable carry handles are 0.04" shorter than A4 milspec height.
Also you can occasionally find real milspec used carry handles on eBay in the $40-50 range. Just be sure they're not Chinese knockoffs or the wrong height. Below is an auction for a Colt pull off. The seller has 100% positive feedback and says "Came of my colt. Like new". Looking at the picture it does appear to be A4 height but it's not the greatest picture. You have a day to ask him questions.
http://www.ebay.com/itm/Colt-Carry-Handle-/281037800898?pt=LH_DefaultDomain_0&hash=item416f2885c2