i do not see why you can not use your denon speaker system. buying another system when you have one already is a waste certainly.
as long as you give speaker placement some thought, you should be able to hide the wires fine. routing on the top or front edge of baseboard moulding with or without the wire trays would work fine. or, if its a carpeted floor you can likely route it tucked into the carpet/baseboard joint. any of this is removable with minimal touch up work.