Thanks for the effort in improving the WP caching plugins scene! Here's a contribution in the form of feedback.
I had a quick try with Quick Cache and unfortunately ended up not using it. One of the two reasons was that it added 0.5kB of comments in the end of each and every page it served. The debug options were turned off.
For best performance, plugins should preferably add nothing and at maximum a tiny amount to the HTML. For security, they shouldn't add anything to not reveal any information to outsiders that can be used for security exploits in the future.
Hopefully this gets changed so that Quick Cache adds nothing to the HTML output by default and a minimal amount when debugging is turned on. This would help the plugin to actually live up to its tagline "Speed Without Compromise".
The other reason was uninstalling was that the plugin asked for the vital wp-config.php file to be kept writable by anyone. This compromise can have severe effects for site security.