I'd use either AIO/Prime, then UPP and call it good. Get some UPPS to renew the slickness after washing and some UGE for normal QD duty and you'll be set. It will be super easy and look and feel great. UPP, AJ, and Z2Pro all look great on silver, but I am partial to UPP lately because I have become quite lazy. I have never seen the hood on my machine silver metallic Corvette shimmer like it does with just UPP. Zaino is nice and shiny, yes, but UPP is just more pleasing to my eyes.
I wouldn't give up on that Speed Shine just yet... it's become one of my very favorites due to its thicker consistency, I tend to use it more after driving the car when there is moderate dust accumulation. I'll use Quik Shine, Adam's, 425, Sonus, UGE, etc. just to add some gloss, but Speed Shine is quickly becoming one of my go-to QDs. It seems like its thickness will help suspend more dust/dirt thus reducing the chance of marring. Of course, I'm no expert :dance