I use an Apple Wireless Keyboard and Apple Magic Mouse with my MacBook Pro, they've worked great since day one and I really enjoy the feel of Apple's keyboards and I like how compact the wireless model is. That being said, the feel of the wired keyboard is exactly the same as the wireless keyboard so if the number pad is important to you then I'd go with the wired keyboard.
As for the trackpad vs. mouse, it depends on which one you'd be more comfortable with and how often you plan on using the various gestures that each device supports. For my needs, the mouse was a better choice as I don't use gestures a whole lot other than navigating back/forward in applications such as Safari, Finder, and iPhoto.
If you do decide to go with any of the wireless devices, I'd recommend picking up a good set of rechargeable batteries - either the Apple Battery Charger (which comes with 6 rechargeable AA batteries and can be purchased from Apple's Online Store or an authorized reseller) or a set of Duracell AA's.
Hope that helps, have a great day! 🙂