I only have use for the Sonic Maximizer so I'll not comment on the other plugins.
The Sonic Maximizer has been one of my go-to plugins since I first used it because it doesn't add to the sound spectrum like classic enhancers, it just delays lower frequencies a bit so you can make higher frequencies more audible, it really cleans and clears up sound.
I try it on every channel with knobs at zero. If it doesn't improve the sound, often happens with digital synths or sampled instruments with well-processed samples, I remove it, if it improves the sound I tweak the knobs. Low settings are for good recordings, high settings for trying to fix bad recordings. After that I put EQ in front of it. You need less EQ because the Sonic Maximizer solves problems you want to fix with EQ. I don't use it on the master because every channel needs its own setting, it takes anything to the front.
The new version just sounds better. Less brittle, more silk.
Just a heads up: version 3.00 has a bug, it starts in silence and adds a fade-in of less then half a second when it starts processing. Version 3.10 fixes that bug but the current uploader still installs 3.00, I tested the win32 and OS X installers, same problem.