1. Tamiya is the "best" as far as fit and accuracy go, Italeri is trash, I have never enjoyed one of their models, they are just sloppy. I refuse to buy their stuff no matter how much people say they have improved.
2. Mostly Testors Acrylic, but I airbrush a lot of Tamiya acrylic too.
3. Tamiya's 1/72 Me 109 is a great kit. Not a ton of detail, but very nice fit, good recessed lines and lots of building options. (Multiple props and noses). I am just finishing one in North African camo.