FYI, you can buy that Faxon barrel direct from Faxon, or from Black River Tactical. No need to wait. I recently bought one myself, on Black River's Labor Day sale. I haven't installed it yet so no range results, but I love the profile. I think it will be just the ticket for a light, fast-handling fighting rifle. In the interests of maximum reliability while fouled, I like that it is a 5.56 chamber, instead of some sort of hybrid match chamber like a Wylde, like ARP uses. I also like how they specify 4150 barrel steel and MP inspected. It will definitely be the lightest weight and best handling of the barrels you are considering. The ARP will be the heaviest (straight .7" profile), and the Spike's will be in between (slightly lighter than gov't profile forward of the gas block). You can't argue with the price on the Faxon, either. I have been really impressed with what I've seen from them so far.