As of today, the Pioneer is $899, with $300 off and the other two are $1299. There are usually sales all the time that cycle, so the yam and the onk will most likely go on sale within a month?
I am leaning toward the 6295 as it has network, USB and 2 HDMI outs. The 9140 has no network, and the 807 has 1 HDMI out and no USB.