The Onkyo TX NR1007 is near the top of Onkyo's 2009 AV Receiver lineup and the least expensive receiver to offer 9 amplifiers, offering 9.2 playback via height or wide speakers to supplement a traditional 7.1 setup. Please note that only a 7.1 + Height or 7.1 + Wide configuration is possible. It is my understanding that the 3007 and 5007 share this limitation.
The NR1007 shares the wattage rating of the 807 at 135 watts per channel, but the 1007 has lower THD (.05% vs .08% in the 807) and can drive the eighth and ninth channel. The added amplification brings more power consumption (a staggering 11.6a) and weight (just under 52lbs). For reference the 3007 weighs 3 more lbs. While I will get into it in more detail later in the audio performance section, the 1007 appears to have more head room than the 807 and has power levels very similar to my 876, but not quite as hammer-dropping as my 906.
Onkyo Product Page:
Owner's Manual/Quick Setup Diagram: