You will get the best answers if you have more eyes on the question. You will get the most eyes on the question by asking each question in its own thread with a good subject line (technically, I'm not entirely convinced that the subject line matters, but it is a courtesy to provide a descriptive title for the thread). Therefore, to get the best answers you should start a new thread for each new question. There's a fair amount of speculative psychology behind that conclusion, but I'll spare you.