Illustrator has a lot of flexibility. I would start with that.
... the cheaper the better?
That is not an Adobe product.
Try Microsoft Publisher and/or Microsoft Expression Design.
Thanks John, I'll give Illustrator a look.
Poor choice of words on my part. I forgot about Publisher, I had it on an old XP machine and used it sparingly. MS Expression Design is new to me I'll give it a look. Thanks Marian
For the time spent learning how to use Illustrator and the cost of it you could probably hire a professional.
If you want to do it yourself for a small company, avoid Adobe all together unless you want to use their 30 day trails - google it for info.
Gimp is good, free, simple. http://www.gimp.org/downloads/
And as above, Publisher and Expression design can be OK - generally it's what you do with the software not the software itself.