I think it depends on what your goal is. Are your looking for products that offer the ultimate in protection? Are you looking for those metalic flakes to pop? Are you looking to deepen the the Indigo blue? Synthetic sealant? Carnauba Wax? Combo of the 2? To aid in your quest, here's a couple of suggestions for ya:
Like Burlyq has stated......Zaino My friend! Start with a good prep ( wash, clay & polish ) Then apply 3 coats of Z5 followed by 3 coats of Z2Pro. Qd with the Z6 & top with Z8. The results with be nothing short of stunning. Longterm durability with easy care maintenance. nice wet look,Metalic flakes "pop".
If your not willing to invest in the Zaino, try the Klasse All In one & Klasse Sealant Glaze combo. The AIO is a terrific product that's pretty user friendly. Not only does it clean the paint, but it provides a great sealant base coat to be used with just about any product you choose as your LSP. Try topping the Klasse combo with your favorite Carnauba wax.
While were talking synthetic products, I've also had great results with Poorboy's EX w/Carnauba,Wolfgang Deep Gloss Sealant & UPP. Like the Klasse products,the EX, WG & UPP can be topped with 'nuba or left as a stand alone sealant. ( it's up to you! ) At this point, don't fprget a quality detailing spray. Use the Sonus Acryilic Spritz & the Acrylic Glanz to maintain your Klasse products. If you're topping the Klasse with a carnauba wax, I recommend my 2 favorites. The Sonus Carnauba Spritz or the Pinnacle Crystal Mist. There are many quality QD's out there so don't be afraid to experiment. Recently, I've mixed both the Carnauba spritz with the Crystal Mist together. ( just for the heck of it )
If it's a Carnauba Wax you're looking for, The Pinnacle Souveran is pricey, but amazing! In additon, I also recommend the P21S,Meguiar's #26 Paste,Trade Secret & the Clearkote waxes. When it comes to Paintwork cleansers & mild polishes, try the Clearkote Vanilla Moose, P21S Paintwork Cleanser & the 1Z MP. ( just to name a few) Since I work strictly by hand ( no PC yet.....) I'll let the other Autopians chime in regarding the best performing polishes to use with a PC.
In closing, with the exception of the Zaino system which will last for 6+ months with proper maintenence, I've found the synthetic products will last for 2-3 months before your stripping it & starting over again. ( I go 2 months, tops ) With Carnaubas, I wax so frequently ( every 2 weeks or so ) that durability isn't an issue. I like to keep that ultra wetlook at it's optimun! Hope this helps!!