In reply to zeokat.

There is no best choice for caching. That was in fact one of the main points of my post ;)

I don't think there are many situations in which using an object cache in conjunction with static page caching is a bad idea though. Most sites have situations in which caching chunks of data would be beneficial.

Varnish's lack of https support is definitely a problem. I'm not going to bother using it for that reason too.

There is a new version of APC, called APCu, which can be used with newer versions of PHP.