mono blocks for home theater?

There's one point that everybody has been forgetting, or they're unaware-of, so far...
There is another advantage to using monobloc amplifiers, if they are located appropriately. With a multi-channel amp, some people are running long lengths of speaker cable, perhaps of questionable quality, to save money. Long runs of speaker cable result in signal loss, vulnerability to RF interference and compromised sound. It's better to run a long SHIELDED interconnect to an amp located right beside the speaker, and a short high quality speaker cable to the speaker.
Of course, this kind of set-up is not for everybody, but there are definite advantages!

I am in the process of asking the same question right now. Should I mono block everything, or just the front three, and stereo the surrounds? I am just in the begining stages of this adventure. I am looking at getting an eVo6,a 6 channel amp, and mono blocking the front 3 channels (350wpc) with it. Then I can run another eV02 in stereo or run a eVo4, and mono the surrounds to have 350 wpc through out my 5.1 system. Just trying to get the best 2 channel/HT system I can get. I also looked at Classe, but it would take 3 amps instead of 2, and wpc would be different into each speaker if that makes any difference, I don't know, but it should be fun finding out. Love this stuff :)

i have just this setup. three large mono blocks up front and one stereo amp for the rear. i use a very large full range center channel speaker, which is a basic assumption for such an amplifier setup. balanced cables from source to amps. 1.5 meter speaker cables. many dedicated circuits, including one for each amp.

this systems doubles as my critical listening system, so at least two of those big mono blocks are "justfied". having a full range center channel with some current behind it, makes a big difference for dialogue and everything else that gets mixed into the center channel. i think i "wasted" some money with the quality of amplification and full range (22-20KHz) speakers for the rear channels, given the lack of information typically present.

true full range speakers (18-20kHz) sound way way better than subwoofers, but again it's a cost/size/performance/cost/cost trade-off thing.

i do not listen to multi-channel music, with the exception of some Meridian trifield occasionally. the pre/pro is piped through a high quality 2 channel analog pre-amp for L/R front channels. the pre/pro directly drives center/LR/RR via balanced.

i have yet to hear any HT system, anywhere, even come close. it does make a big difference, and it does require a room big enough to hold all this stuff, HVAC, and people too.

was it worth the expense?????
that's a very personal qualatative question.