I want to get into the world of .308 carbine. But not wanting to spend more than 1000-1400 to start up. I can upgrade later but just want something basic to get started. I have my eye on the DPMS AP-4. Any suggestions? reviews? looks like a fun carbine for the money. I believe it retails for about 1200 at most stores and some places a bit less. 'Used' I might be able to find one for just over a grand or so.