Here's a review of the Earthquake Cinenova Grande 5. One bonus feature of this amp is that it has crossovers built into each channel, so you could use it to actively bi-amp your speakers if you wanted(which would also require you to disable your speaker's internal crossover). You could set two channels to high pass and connect them to the upper posts of your main speakers, and set another two channels to low pass and connect them to the bottom posts of your main speakers. Then set all four crossovers to the exact same point that your speaker's internal crossover uses and you should be good to go. Use the leftover channel for your center speaker.
The last graph in that review is of slight concern since the amp's response does dip down a smidge at the extremes near 20Hz and 20kHz, but I doubt it would be very audible.
