If you do decide to use Pages, and there is no need for the recipient to edit the attachments, I recommend sending the file as a PDF (one of Pages' export options). That pretty much guarantees the recipient will see exactly what you see on the iPad.
The other Office apps listed here are popular with a fair number of other members. I can't recommend one above the other based on personal experience, and the only side by side comparisons I've seen are too old to be meaningful. If your edits are simple ones, just about any of the apps recommended here (by myself or TheRealRiley) will work.
However; I would consider buying the best based on your possible needs, rather than worrying about the price. Any amount of money you pay will become a waste if you find out later you needed a more capable app, and end up buying it also. Once you have an Office editing app on your iPad you are likely to find more uses for it than what you currently plan.