ACOGs are indeed wonderful, if you want magnification. I have been very pleased with them as well. If you can find one in good shape for $600, then you have a bargain!
"If you look through your scope and see your shoe, aim higher." -- said to me by my 11 year old daughter before going out for hogs 8/13/2011
My Hunting Videos https://www.youtube.com/user/HornHillRange