i am looking to buy an ar soon and was pretty much sold on the s&w mp15orc ($750 w/ s&w rebate) until i handled a new bushmaster "m4 post ban carbine" i liked it a lot but its a little more expensive. i've been quoted $790-850 cash for one but have heard some dealers getting $900+. it has a removable carry handle w/ iron sights and a compliant muzzle brake. also comes with lockable case. has anyone out here bought one of these or is there anything i need to know about them?