I am considering a power upgrade for my 1070 receiver. I am using it with Cambridge Soundworks speakers - Tower II front speakers, Centerstage, The Surround, Ensemble IV cubes in the rear, and the old CSW Powered Sub/Slave. I have a chance to buy an Atlantic A-2000 for $350 but I'm not sure if I will hear much of a difference. Another option I have is to use an old Pioneer SX-1050 (watts/channel) as an amp for just the front speakers which would cost nothing. Any suggestions would be appreciated. Thanks in advance.