It really depends on your personal preference. I personally like sealants on lighter colored (Especially metallics)cars like yours because sealants have that extra sparkle I prefer. I usually save my carnauba waxes for my red Prelude VTEC because they give a deeper muted look.
These are my favorite sealants:
Menzerna FMJ: Not very durable, but it has a unique sparkle I have not seen anywhere else.
Blackfire Wet Diamond: Very durable and gives the car a very wet look. This might be your best bet.
Zaino Z2Pro: The most durable sealant I've encountered. Would add a very nice sparkle to your car. Application and removal is a finicky. Follow instructions to the letter or you'll spend all day trying to wipe it off!
I've used others also and I'm sure others will chime in with their favorites, but these are my favorites.
BTW, you can apply any of these on top of Klasse All-in-One. Klasse AIO is a favorite amongst detailing enthusiasts as a base sealant for other sealants/waxes to go on top of. I would definitely apply Klasse AIO on the car before applying the other sealants I've mentioned. Same goes for waxes.
If you want to stick with a carnauba wax for your car, I would use either Wolfgang Fuzion or S100. If you check around, you'll notice that Fuzion is not exactly cheap, whereas, in my opinion, S100 is probably one of the best carnauba waxes out there, especially if you throw in it's price of only around $15. You can get S100 at any local Harley Davidson dealership. In case you're interested, they also sell a very good paint cleaner. I think it's called S100 Shine Enhancing Cleansing Lotion. I've used it before applying wax and it's really good at cleaning the paint.