Ok so I havent done it yet but I am also going to monstaline my jeep as well. But what I have is a small amp, Power Acoustik RZ1-1500D (rz11500d) Monoblock RAZOR Class D Car Amp
and a 8 inch subwoofer in my center consul. My amp is under my driver seat, due to the small size it is hardly even seen, and I just run my wires through some of that Black plastic tub thing for wires.... haha so not sure of the proper name of that stuff. I stuck it up against the underside of the lip where my stock wires for my rear tail light wires run and it is completely hidden. Took the wires from there and went through the fire wall right into the battery and of course split the remote wire and ground wire to where they needed to go. Very easy for a Jeep it is just enough bass!!!
Hope that info was sorta helpful