In your opinion, what's the best of the 3 PPC companies: Google Adwords, Yahoo Search Marketing or MSN adCenter?
I have used all three. Although Google will get you more exposure, the question of what is better is really dependent on who you are targeting. I find that MSN is actually better for B2B advertising. Google and Yahoo are good for general audience. Try them out with small budgets to start and stick with the one that gets you better ROI.