Yeah, go for simpler ones unless you really need to creatively impress the audience. For example, if the audience are just looking for info, a nice and simple presentation would be good, whereas if the audience are looking for creative solutions, or designs and the like, then you really need to spend some time buuilding an impressive presentation with those softwares.
Flash is a good choice for these kinda tasks, as it's good enough to create highly impressive stuff while keeping the file size relatively small compared ot other solutions.
If you're not familiar with these terrains, better get a freelancer to do it for you. Go to
www.elance.com or was it
www.elance.net???
Can't remember, anyway, you should be able to find good help from there
should you need to.