I own an Onkyo 797 which I love, but my front two tower speakers are 4ohms, and 2ch amps are reletively inexpensive, Parasound 1000A, Rotel 1070. Will it be okay, soundstage wise, for me to add an additional 2ch amp, or will my front soundstage sound awkward since the center would be running off of my 797. The 797 has no trouble powering all speakers simultaneously, but I would like the extra headroom and omph that a seprate amp would give me. The 5ch equivilants to the 1000A(1205A) and the 1070(1075) are more than I would like to spend. The Parasound 855A is in the limit, but it seems to not have has much per channel as the 1000A and 1070, and really I only need the extra amp for my front two speakers to reduce the load. Please help me out, not sure about this.