You have made a purchase or are you asking advice on what to purchase? If the latter, then a MacBook Pro 15". Can do what you specified in your post and can be connected to a projector for large audiences.
Good to hear from you. You’ll find a whole bunch of iPad enthusiasts in this Forum who are only too willing to help other iPad owners and to hear of their experiences. Don’t be afraid to post any questions you may have or use the ‘Search’ button near the top of the Forum web page. I usually find I discover one new interesting and useful piece of information about my iPad every day - and often not even what I was looking for!!
Hope to hear from you soon with your thoughts about the iPad.
Have fun and enjoy your iPad
One of our members carried out a survey of Office apps for his company; you can see his conclusions in this thread...
Well, definitely buy a keyboard if you plan to respond to email w/ long replies and to use office type programs, such as those mentioned by Tim above -
I've purchased Pages & Keynote, the latter is a PowerPoint app (of course, does not have the power of the MS product but is quite impressive) - your iPad can be attach to a monitor or a projector but I've not given that a try, so others may want to 'chime in' regarding and ease & reliability of this latter option.