I was in exactly your position last year and after doing all my due diligence by reading here voraciously, I decided to get a PC and Menzerna products for my black BMW 540. It's easy to think you are going to find some magic bullet combination of products and process that will allow you to make your car perfect, but that's just not true. Everybody has their favorites for a host of reasons.
I have been very happy with the Menzerna line of products; I have used their Final Polish, their Finishing Touch Glaze, their Full Molecular Jacket sealant, and their HGAS detailer and the car looks great. But that doesn't mean this year I won't try another sealant just for the heck of it to see how it differs.
You sure won't go wrong w/ Menzerna, so like the fella above said: buy some and have at it. You'll be starting a learning process that will keep you engaged and entertained for years.
My .02,
Nick