UPDATE: well, my first detail turned into about 8 now!!! I've used XMT 360 topped with DP max wax! Everyone has been extremely happy!! But, the more reading i do i feel like i'm wasting time following an AIO w/ carnuba.. But i feel i'll get a little more durability with that combo.. i'm looking at a dedicated polish (Menzerna Power Finish) followed then by Dp Max Wax.. any opinions on that?? little more correction and less durabiltiy.. since i'm goin over the car twice may as well use a good polish???
I'd say drop everything and get the Meguiars Micro Fiber 5" system and one extra bottle (32oz) of the D300 compound (you get a 16 bottle with the kit, but buy an extra one just in case). Get the 5", not the 6".
This system is PERFECT for what you're trying to accomplish without all the complication of these other products you've mentioned. Made for OEM paint.
The system may be a 2 step, but the second step is super fast, just watch the video here on AG or Youtube, so you're basically doing a 2-step that feels like 1-step.
The D301 Wax (it's basically a fine polish with wax) will last about 4 months and looks great for these type of clients you have.
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As for the carpet stains:
303 Fabric cleaner (gallon on sale nor for $29, super concentrated)
a good carpet brush
and a shop-vac to suck up the mess later, or a Bissel extractor ($100)
FOLEX is a great carpet cleaner available over the counter (Lowes), but since the 303 Carpet Cleaner is on sale at the moment, and 1 gallon will make 3 gallons of mixture, I'd say get the 303!