I used the standard webinar registration page. Simple. Takes only seconds to setup. I find now that I waste too much time trying to create a fancy looking page.
The goal here is speed. Anything that is taking too much time, go with the fastest solution and get it done. Remember, you can do your presentation as often as you like. It is not a one time deal. You can make it better each time as you get used to doing it. But the goal is to get the first one done ASAP.