Live a bit, spend a little money. Buy a selection of different types of paper and examine the results you get.
The difference in reproduction between the 3 grades: Copier, Ink-jet and Colour Ink-jet, are an eye opener. Before you have even started on the Photo quality grades, both Matt and Gloss.
As you may remember I have recently bought an i850 and have just produced a Flyer for the local Tourist Information Centre. Both my staff and myself decided that it was worth spending the extra on photo quality paper, in order to stand out from the crowd.