Hey there guys, I have a question regarding an option I have in regards to optics for my newly acquired DDM4 MK18. Got the rifle from a friend of mine, and he offered me an Aimpoint CompM4S for $500 (he's had the setup for about 3 months. Rifle, optics, everything). Now...I know it's a pretty damn near top of the line rifle and it probably deserves a comparable sight but I'm not the kind of guy to go running around throwing cash everywhere. That's where the Vortex Sparc2 comes in. That sight runs about $250 around here and seems decent. What I'm looking for is a direct comparison using personal experience from you guys. Basically...is the aimpoint really worth the extra money, and why? Thanks!