I'm just going to run through your list and give
my recommendations. These are by NO way the only products to choose from. There is just simply wayyyyyyy to many good products out there. (Btw, Autogeek is top notch and you won't be disappointed with ANY of those products.)
First off, great choice with the kit you already have. There's a reason why I have two jars of Souveran paste and a spray of every Pinnacle product there is!! haha.
If you listed everything that came with the kit, then you do not have any corrective polishes yet, therefore the PC kit would be perfect for you.
I would strongly recommend the kit you mentioned as a link. HOWEVER! I would contact AG, and replace the XMT Glaze with XMT #3. Therefore, you have XMT #1-#3. This shouldn't be a problem because XMT #3 and the glaze are the same price. Also, they put each "kit" together by hand anyways at their warehouse, so wouldn't be a big deal. I would also mention this in the "notes" section when you place your order and check out.
The reason I suggest to replace glaze with XMT #3 is for multiple reasons. XMT #2 is not all that powerful, so I'd get XMT #3 just in case you come across some heavier swirls or scratches. Also, the Wolfgang polish enhancer you already have is very similar to the XMT glaze, so no need for two virtually identical products.
I would also add the Green CCS Pad. My personal favorite for using paint cleaners and light polishes like XMT #1.
To me, this would be a very very good starter set with the products you have. To be honest, if I had to make an order for starters, it would look almost identical to yours.
Clay bar kits: The pinnacle kit is top notch. The clay is super fine compared to others like Meguiars, Mother's, and Clay magic. This is ideal clay for those who continually polishes and keeps their vehicle "clean" like myself.
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If you don't plan on claying often, I'd recommend the DP kit because of value. 2 4oz. clay bars instead of one and more lube.
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Wheel cleaner: DP Gel cleaner, P21S wheel cleaners, and Megs Wheel brightener diluted 4:1 are my faves. (P21S being the safest because it's citric and not acidic, however not as powerful and sometimes requires two sprayings)
Tire dressings: gels, gels, gels. That is all, haha. I prefer gels by far because of much longer durability. Just be sure to give an extra wipe off with an old towel after applied.
**A secret I like though: Armor All Tire Foam to clean the rubber - wipe off with an old towel - then apply Armor All Extreme Gel over this newly shined base. Great look and long durability.
Soaps: Wayyyy to many. My personal fave and the reason I have a gallon of it is Duragloss #901. Great cherry scent and suds like crazy.
Another extremely popular line are the Poorboy's line of washes.
AND of course, Pinnacle and Wolfgang as always. (IMHO though, there are some areas of detailing where Pinnacle and Wolfgang are simply too much, and this is one of them).
As always, have fun with detailing and don't make it into a pain! Anymore questions please ask!