Ahh, I didn't look at the product. My mistake. The big difference between these products is that the P-6900 is a 30 amp unit, which will require special wiring. If all of your gear fits into 10 amps, then the 2300 IT E might work. It looks like it uses female IEC connectors on it, which would be a pain. You wouldn't need to add the P-1400 to it. It's basically a big transformer, so if it's making noise, there's something wrong.
I went with the 2RQ for my requirements, but here's a link to Equitech's product page for one that fits yours. The Model Q for Professional A/V Applications
Off topic, "Symmetrically Balanced" seems redundant, but I guess they had to change the name to not get sued by Equitech.
10 amps at 240 volt I believe is the equivalent to 20 amps at 120, so I could see that working out fine. The biggest power hog in my room is the Mac Pro, which I believe has a 1000 watt power supply. It almost never actually pulls that much.