Can't compare the E6 because it doesn't exist yet.

I talked about the HTL9100 in my post above, the B5 is basically the HTL9100 with better battery life on the rear speakers and reworked DSP. They basically sound the same.
The RT5 > B5, there's no contest.

In stereo mode, YSP 2500 has better dynamics, a better balance in tonality and a more weightier sound overall. But that's in stereo mode, I repeat.
Turn on the virtual surround vs the real surround on the Sony RT5, the winner is obvious: the RT5. There's really no contest.
Feature wise, the YSP2500 and RT5 is quite neck and neck. So you can't go wrong with either of them, features alone.


Which brings us to price. The RT5 can be gotten for 2.2k, last I check the YSP2500 goes for at least 2.9k. That's RM700 difference! You gimp yourself for virtual surround for a better stereo image? Might as well get a pair of KEF Q100 + Yamaha RXV379 (or any other equivalent entry level AVR) for just a couple hundred more, of which would obliterate the YSP2500 into non-existance.