In order starting with the weather and working down:
1/ Good shit!!
2/ Run streeters, you know you want to.
3/ No.
4/ Yes.
and
Thoughts:
Don't run crossply rear tyres with radial fronts. It gets very ugly, very fast. If you run quicker than 12.500 like that you'll get a boot in the arse but it can be unsafe long before that point.