I used to own a Formula 1 (quartz) but I now have an Aquaracer. The Aquaracer is definitely better quality IMHO. The automatic movement is definitely the way to go so it will last forever. If you can afford the ceramic bezel, get it.
If you're open to non-TAG models, I strongly recommend looking for an Omega Seamaster or Speedmaster. There are some good ones which can be had for $2000 with guaranteed legitimacy. Then I would recommend you find an Omega boutique (they have them everywhere) and have them give the full service. They'll replace the gaskets, clean it out, make it look like brand new, and then you'll get it back. For about $2500 you have a rehabilitated watch good as new.
I know nothing about Prada bags or LV, but if you buy a TAG and a LV bag, you'll be writing a big ole check to the same company (LVMH).