You already have a great combination of products so what ever you add to it will be a plus..

rops:
Pinnacle Souveran Liquid Wax is a really nice wax. It lays down beautifully with a dual action polisher and once it hazes it buffs to a nice shine; a truly nice product.
Collinite 845 has to be my all-time favorite wax. This stuff goes on so easily and I apply it with my
Porter Cable 7424 dual action polisher using a red
Lake Country pad. A few small dots is all you'll need to do an entire panel.
"
Collinite 845 Liquid Insulator Wax, for example, is one of the finest
liquid carnauba waxes you can buy.
It has the shine and wetness of carnauba but its longevity is more like a paint sealant. You can expect up to 5 months of protection and incredible water-beading, even on non-garaged vehicles."
The biggest difference I see between the two is the depth of
Collinite 845 is much deeper than
Pinnacle Souveran Liquid Wax. Between it's depth, wet look, and longevity
Collinite 845 would be my choice.
You've already used and have experience with
Collinite 845. I suggest that you do a comparison on one panel and make your decision based on the results.
The bottom line is they're both great products...:dblthumb2: