1 - yes
2 - no
3 - depends exactly which model thermaltake. Some are good, some are bad.
4 - yes
5 - no
6 - I wouldnt, but some people think they are ok.
If it were my PC i would go the silverstone or corsair. For a single graphics card you could go for the 500w models in these brands. to save a bit of money. But its always a good idea to spend the extra incase you need more power in the future.