Using WinForms and WPF in the same project

Question

Hey

I'm about to start a project (pretty large one) so I'm gathering informations that could help me decide which way to go. The application that should be the result of this project is intended for a large group of users that have very different levels of computer usage education. I'm mentioning this because one of requests is that the user interface is visually comprehensive and intuitive, but also "easy on the eye". For that reason, I started researching WPF. If I understand it correctly, WPF is intended for that purpose, to make the Windows applications more presentable. Since I never worked with WPF before, I need your advice. Is WPF enough on it's own (the project is an administration application, and as such, it contains many "business oriented" elements like reporting, single/multiple database communication/manipulation etc), or will I need to use WinForms too (or should I just stick to WinForms)? Also, are there some specific requirements concerning computer software/hardware (all of the computers that the application will be installed on are Windows based PC-s, but I'm not sure how much "machine power" do they have)?

Since this is my first project of this magnitude that I'm starting on my own (my superiors will help me, but they are not programmers, they can only explain the functionalities that need to be implemented), any advice would be more than welcome.
Thanks