In response to the speech, I would say this. Don't rely on what somebody else might think about saying. We don't know the groom or the bride. That's really gotta be something you do on your own IMO. Otherwise, it can easily sound canned and that's not a good thing for a wedding toast.
Best piece of advice I can give is that you keep in mind that this is for the Bride and the Groom. It is not for the Best Men or the Brides Maids or anybody else. Do things that make it easier for them. Do things that make it special for them. Do things that will make them happy and that will help them down the path. Don't do things that will only create problems later. Don't plan things that would be cool for other people, more so then the couple intended. Don't be a hindrance, be The BEST Man you can be in this process. Don't base your plans off of an episode of Two and a Half Men. Marriage is hard enough, try to make this part of it a great start that will help them have a successful life together.
Good Luck!