Any good stereo imagers recommended for Sonar x2?

To replace my Waves S1 and 64bit precision as possible

hey parco,

Are you not satisfied with the Waves S1 ?
Personally, I have the Sonalksis Stereo tool (which looks like the S1) and when I demoed it, I was very impressed ! It's considered as the best stereo tool plug and it's true theat Sonalksis is well famous for the undeniable quality of their plug-ins ! By the way, I 've compared with the freeware Flux stereo (whose name is also very famous in the audio plug-in world) and it appeared to me that Sonalksis was superior.

But as the mixing tasks proceed, projects after projects, I realize that the Sonalksis couldn't be put directly on the Master bus with this magical effect confering instant and gratifying wideness to the entire mix. (although with subtle settings, the Sonalksis do bring something in comparison with similar other plugs). I mostly use it on bus for widening a reverb, background vocals, violins and synth pads... But I imagine you can get similar results with the S1 ?

Channel Tools is good too but nowhere near as comprehensive as iZotope Ozone 5's stereo imaging tool!

Ozone is ok for widening pre-existing stereo content. By far the most comprehensive i've used is http://www.nugenaudio.com/stereopack_RTAS_VST_AU.php
One of the few that can actually deal with mono to stereo well.

Here are a couple you can checkout;

Sheppi: (Free)
Inspired by Bob Katz KStereo Ambience Enhance
http://dallashodgson.info/articles/OpenAmbienceProject/

Stereooerests: ($29)
Splits the high and low freqs via an adjustable crossover and alsoe allows you to adjust the width plus  boost and cut. Works great on stereo and Mid/Side stuff. Personal it really shines for me as a creative mixing tool busses and individual tracks. 
http://www.ddmf.eu/product.php?id=5

There is another one more expensive but I can recall the name of it. Will post it once it comes back to me.

quad image and IK credits are on sale right now. picked it up yesterday for 42 bucks (usually 80 i think)

I find myself using Brainworx Stereo Maker , Its has great phase adjustments and sounds more musical

Ozone and IK's T-Racks "Quad Image".

Both do a GREAT job.