I have to correct my previous calculations:
4) precise-proposed + PPAs ubuntu-x-swat/x-updates + xorg-edgers/ppa (mesa 8.1~git20120618.1692d3ad-0ubuntu0sarvatt~precise, compiz 1:0.9.7.8-0ubuntu1.1, xserver-xorg-video-intel 2:2.19.0+git20120628.31caa43a-0ubuntu0sarvatt~precise).
In case of 4 - Expo mode handles up to 35-40 windows but not more.
It is still twice more than other variants (1-3) but less than I've posted early.
I have to correct my previous calculations: x-swat/ x-updates + xorg-edgers/ppa (mesa 8.1~git20120618 .1692d3ad- 0ubuntu0sarvatt ~precise, compiz 1:0.9.7. 8-0ubuntu1. 1, xserver- xorg-video- intel 2:2.19. 0+git20120628. 31caa43a- 0ubuntu0sarvatt ~precise) .
4) precise-proposed + PPAs ubuntu-
In case of 4 - Expo mode handles up to 35-40 windows but not more.
It is still twice more than other variants (1-3) but less than I've posted early.