1. When looking at speaker specs, what is the minimum number to indicate that a speaker is effiecient and easier to drive? 2. How much of a difference does this spec make. ex. the difference between 93dB and 96dB. Is it significant? 3. Which mainline manufacturers produce more efficient speakers? 4. Which speakers would marry well with the Yamaha RX V-2400 receiver for music? HT is nice but crisp, clear, foundation rocking music is what I'm after. I'd like to stay below 2K for fronts, surrounds, and sub, but could be convinced to go higher.....just no 2nd mortgages OK? LOL Any advice is greatly appreciated. I'm going blind from reading specs and trying figure things out.